20430725056 has 56 divisors (see below), whose sum is σ = 46350606816. Its totient is φ = 8752880640.

The previous prime is 20430725053. The next prime is 20430725111. The reversal of 20430725056 is 65052703402.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430725053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1587126 + ... + 1599946.

Almost surely, 2^20430725056 is an apocalyptic number.

It is an amenable number.

20430725056 is an abundant number, since it is smaller than the sum of its proper divisors (25919881760).

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

20430725056 is a wasteful number, since it uses less digits than its factorization.

20430725056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16397 (or 16387 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 34.

The spelling of 20430725056 in words is "twenty billion, four hundred thirty million, seven hundred twenty-five thousand, fifty-six".