18436964 has 24 divisors (see below), whose sum is σ = 39711168. Its totient is φ = 7293600.

The previous prime is 18436937. The next prime is 18436987. The reversal of 18436964 is 46963481.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24962 + ... + 25689.

It is an arithmetic number, because the mean of its divisors is an integer number (1654632).

Almost surely, 2^18436964 is an apocalyptic number.

18436964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18436964 is an abundant number, since it is smaller than the sum of its proper divisors (21274204).

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

18436964 is a wasteful number, since it uses less digits than its factorization.

18436964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50675 (or 50673 counting only the distinct ones).

The product of its digits is 124416, while the sum is 41.

The square root of 18436964 is about 4293.8285946228. The cubic root of 18436964 is about 264.1778912768.

The spelling of 18436964 in words is "eighteen million, four hundred thirty-six thousand, nine hundred sixty-four".