20056388 has 12 divisors (see below), whose sum is σ = 38289552. Its totient is φ = 9116520.

The previous prime is 20056363. The next prime is 20056403. The reversal of 20056388 is 88365002.

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, 227870 + ... + 227957.

It is an arithmetic number, because the mean of its divisors is an integer number (3190796).

Almost surely, 2^20056388 is an apocalyptic number.

It is an amenable number.

20056388 is a deficient number, since it is larger than the sum of its proper divisors (18233164).

20056388 is a wasteful number, since it uses less digits than its factorization.

20056388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455842 (or 455840 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20056388 is about 4478.4358876733. The cubic root of 20056388 is about 271.6966232580.

The spelling of 20056388 in words is "twenty million, fifty-six thousand, three hundred eighty-eight".