20430413656 has 16 divisors (see below), whose sum is σ = 38358594000. Its totient is φ = 10201455264.

The previous prime is 20430413639. The next prime is 20430413681. The reversal of 20430413656 is 65631403402.

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, 1712631 + ... + 1724518.

It is an arithmetic number, because the mean of its divisors is an integer number (2397412125).

Almost surely, 2^20430413656 is an apocalyptic number.

It is an amenable number.

20430413656 is a deficient number, since it is larger than the sum of its proper divisors (17928180344).

20430413656 is a wasteful number, since it uses less digits than its factorization.

20430413656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3437898 (or 3437894 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 20430413656 in words is "twenty billion, four hundred thirty million, four hundred thirteen thousand, six hundred fifty-six".