20124641520 has 120 divisors (see below), whose sum is σ = 67732977312. Its totient is φ = 5354841600.

The previous prime is 20124641513. The next prime is 20124641543. The reversal of 20124641520 is 2514642102.

20124641520 is a `hidden beast` number, since 2 + 0 + 1 + 246 + 415 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 301605 + ... + 362235.

Almost surely, 2^20124641520 is an apocalyptic number.

20124641520 is a gapful number since it is divisible by the number (20) 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 20124641520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33866488656).

20124641520 is an abundant number, since it is smaller than the sum of its proper divisors (47608335792).

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

20124641520 is a wasteful number, since it uses less digits than its factorization.

20124641520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61111 (or 61102 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The spelling of 20124641520 in words is "twenty billion, one hundred twenty-four million, six hundred forty-one thousand, five hundred twenty".