18444812 has 18 divisors (see below), whose sum is σ = 33435948. Its totient is φ = 8902768.

The previous prime is 18444809. The next prime is 18444823. The reversal of 18444812 is 21844481.

It is a super-2 number, since 2×18444812² = 680422179430688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 623 + ... + 6105.

Almost surely, 2^18444812 is an apocalyptic number.

It is an amenable number.

18444812 is a deficient number, since it is larger than the sum of its proper divisors (14991136).

18444812 is a wasteful number, since it uses less digits than its factorization.

18444812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5545 (or 5514 counting only the distinct ones).

The product of its digits is 8192, while the sum is 32.

The square root of 18444812 is about 4294.7423671275. The cubic root of 18444812 is about 264.2153698622.

The spelling of 18444812 in words is "eighteen million, four hundred forty-four thousand, eight hundred twelve".