20457040056 has 16 divisors (see below), whose sum is σ = 51142600200. Its totient is φ = 6819013344.

The previous prime is 20457040033. The next prime is 20457040057. The reversal of 20457040056 is 65004075402.

It is a junction number, because it is equal to n+sod(n) for n = 20457039999 and 20457040026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20457040057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426188311 + ... + 426188358.

Almost surely, 2^20457040056 is an apocalyptic number.

It is an amenable number.

20457040056 is an abundant number, since it is smaller than the sum of its proper divisors (30685560144).

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

20457040056 is a wasteful number, since it uses less digits than its factorization.

20457040056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852376678 (or 852376674 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

The spelling of 20457040056 in words is "twenty billion, four hundred fifty-seven million, forty thousand, fifty-six".