20463843201984 has 448 divisors, whose sum is σ = 75148123008000. Its totient is φ = 5316501712896.

The previous prime is 20463843201979. The next prime is 20463843202003. The reversal of 20463843201984 is 48910234836402.

It is a happy number.

20463843201984 is a `hidden beast` number, since 2 + 0 + 46 + 384 + 32 + 0 + 198 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 20463843201984.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9564442 + ... + 11506790.

It is an arithmetic number, because the mean of its divisors is an integer number (167741346000).

Almost surely, 2^{20463843201984} is an apocalyptic number.

20463843201984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20463843201984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37574061504000).

20463843201984 is an abundant number, since it is smaller than the sum of its proper divisors (54684279806016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20463843201984 is a wasteful number, since it uses less digits than its factorization.

20463843201984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942457 (or 1942441 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 54.

The spelling of 20463843201984 in words is "twenty trillion, four hundred sixty-three billion, eight hundred forty-three million, two hundred one thousand, nine hundred eighty-four".