20245987056 has 40 divisors (see below), whose sum is σ = 52488296784. Its totient is φ = 6724641280.

The previous prime is 20245987049. The next prime is 20245987079. The reversal of 20245987056 is 65078954202.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 20245986996 and 20245987014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 737031 + ... + 764006.

Almost surely, 2^20245987056 is an apocalyptic number.

It is an amenable number.

20245987056 is an abundant number, since it is smaller than the sum of its proper divisors (32242309728).

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

20245987056 is a wasteful number, since it uses less digits than its factorization.

20245987056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501329 (or 1501323 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 20245987056 in words is "twenty billion, two hundred forty-five million, nine hundred eighty-seven thousand, fifty-six".