20057188 has 24 divisors (see below), whose sum is σ = 35897400. Its totient is φ = 9803520.

The previous prime is 20057171. The next prime is 20057189. The reversal of 20057188 is 88175002.

It can be written as a sum of positive squares in 4 ways, for example, as 272484 + 19784704 = 522^2 + 4448^2 .

It is not an unprimeable number, because it can be changed into a prime (20057189) 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, 43278 + ... + 43738.

It is an arithmetic number, because the mean of its divisors is an integer number (1495725).

Almost surely, 2^20057188 is an apocalyptic number.

It is an amenable number.

20057188 is a deficient number, since it is larger than the sum of its proper divisors (15840212).

20057188 is a wasteful number, since it uses less digits than its factorization.

20057188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 20057188 is about 4478.5252036803. The cubic root of 20057188 is about 271.7002356467.

The spelling of 20057188 in words is "twenty million, fifty-seven thousand, one hundred eighty-eight".