18966936 has 16 divisors (see below), whose sum is σ = 47417400. Its totient is φ = 6322304.

The previous prime is 18966931. The next prime is 18966949. The reversal of 18966936 is 63966981.

It is a super-2 number, since 2×18966936² = 719489322456192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18966931) 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, 395121 + ... + 395168.

Almost surely, 2^18966936 is an apocalyptic number.

It is an amenable number.

18966936 is an abundant number, since it is smaller than the sum of its proper divisors (28450464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18966936 is a wasteful number, since it uses less digits than its factorization.

18966936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790298 (or 790294 counting only the distinct ones).

The product of its digits is 419904, while the sum is 48.

The square root of 18966936 is about 4355.1045911666. The cubic root of 18966936 is about 266.6852889773.

The spelling of 18966936 in words is "eighteen million, nine hundred sixty-six thousand, nine hundred thirty-six".