18956036 has 12 divisors (see below), whose sum is σ = 36188880. Its totient is φ = 8616360.

The previous prime is 18956009. The next prime is 18956057. The reversal of 18956036 is 63065981.

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, 215366 + ... + 215453.

It is an arithmetic number, because the mean of its divisors is an integer number (3015740).

Almost surely, 2^18956036 is an apocalyptic number.

It is an amenable number.

18956036 is a deficient number, since it is larger than the sum of its proper divisors (17232844).

18956036 is a wasteful number, since it uses less digits than its factorization.

18956036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430834 (or 430832 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 18956036 is about 4353.8530062463. The cubic root of 18956036 is about 266.6341925733.

The spelling of 18956036 in words is "eighteen million, nine hundred fifty-six thousand, thirty-six".