20056155 has 32 divisors (see below), whose sum is σ = 36868608. Its totient is φ = 9120000.

The previous prime is 20056147. The next prime is 20056177. The reversal of 20056155 is 55165002.

It is not a de Polignac number, because 20056155 - 2³ = 20056147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25975 + ... + 26735.

It is an arithmetic number, because the mean of its divisors is an integer number (1152144).

Almost surely, 2^20056155 is an apocalyptic number.

20056155 is a deficient number, since it is larger than the sum of its proper divisors (16812453).

20056155 is a wasteful number, since it uses less digits than its factorization.

20056155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 20056155 is about 4478.4098740513. The cubic root of 20056155 is about 271.6955711317.

The spelling of 20056155 in words is "twenty million, fifty-six thousand, one hundred fifty-five".