20453556105656 has 32 divisors (see below), whose sum is σ = 40162295953440. Its totient is φ = 9746820935808.

The previous prime is 20453556105641. The next prime is 20453556105677. The reversal of 20453556105656 is 65650165535402.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 20453556105598 and 20453556105607.

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, 200599991 + ... + 200701926.

It is an arithmetic number, because the mean of its divisors is an integer number (1255071748545).

Almost surely, 2^{20453556105656} is an apocalyptic number.

It is an amenable number.

20453556105656 is a deficient number, since it is larger than the sum of its proper divisors (19708739847784).

20453556105656 is a wasteful number, since it uses less digits than its factorization.

20453556105656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401302223 (or 401302219 counting only the distinct ones).

The product of its (nonzero) digits is 16200000, while the sum is 53.

The spelling of 20453556105656 in words is "twenty trillion, four hundred fifty-three billion, five hundred fifty-six million, one hundred five thousand, six hundred fifty-six".