20366771572 has 48 divisors (see below), whose sum is σ = 42390754560. Its totient is φ = 8377108992.

The previous prime is 20366771569. The next prime is 20366771599. The reversal of 20366771572 is 27517766302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60508 + ... + 210700.

It is an arithmetic number, because the mean of its divisors is an integer number (883140720).

Almost surely, 2^20366771572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20366771572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21195377280).

20366771572 is an abundant number, since it is smaller than the sum of its proper divisors (22023982988).

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

20366771572 is a wasteful number, since it uses less digits than its factorization.

20366771572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150400 (or 150398 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 46.

The spelling of 20366771572 in words is "twenty billion, three hundred sixty-six million, seven hundred seventy-one thousand, five hundred seventy-two".