20503612256 has 24 divisors (see below), whose sum is σ = 41305244904. Its totient is φ = 10013391360.

The previous prime is 20503612249. The next prime is 20503612303. The reversal of 20503612256 is 65221630502.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7449065 + ... + 7451816.

It is an arithmetic number, because the mean of its divisors is an integer number (1721051871).

Almost surely, 2^20503612256 is an apocalyptic number.

It is an amenable number.

20503612256 is an abundant number, since it is smaller than the sum of its proper divisors (20801632648).

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

20503612256 is a wasteful number, since it uses less digits than its factorization.

20503612256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14900934 (or 14900926 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 20503612256 in words is "twenty billion, five hundred three million, six hundred twelve thousand, two hundred fifty-six".