18938056 has 16 divisors (see below), whose sum is σ = 36111600. Its totient is φ = 9308304.

The previous prime is 18938047. The next prime is 18938057. The reversal of 18938056 is 65083981.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18938057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19590 + ... + 20533.

It is an arithmetic number, because the mean of its divisors is an integer number (2256975).

Almost surely, 2^18938056 is an apocalyptic number.

It is an amenable number.

18938056 is a deficient number, since it is larger than the sum of its proper divisors (17173544).

18938056 is a wasteful number, since it uses less digits than its factorization.

18938056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40188 (or 40184 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 18938056 is about 4351.7876786443. The cubic root of 18938056 is about 266.5498641246.

The spelling of 18938056 in words is "eighteen million, nine hundred thirty-eight thousand, fifty-six".