18864056 has 8 divisors (see below), whose sum is σ = 35370120. Its totient is φ = 9432024.

The previous prime is 18864047. The next prime is 18864091. The reversal of 18864056 is 65046881.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×18864056² = 711705217542272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1178996 + ... + 1179011.

It is an arithmetic number, because the mean of its divisors is an integer number (4421265).

Almost surely, 2^18864056 is an apocalyptic number.

It is an amenable number.

18864056 is a deficient number, since it is larger than the sum of its proper divisors (16506064).

18864056 is a wasteful number, since it uses less digits than its factorization.

18864056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358013 (or 2358009 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 18864056 is about 4343.2771037547. The cubic root of 18864056 is about 266.2022318736.

The spelling of 18864056 in words is "eighteen million, eight hundred sixty-four thousand, fifty-six".