18486444 has 24 divisors (see below), whose sum is σ = 43449280. Its totient is φ = 6117264.

The previous prime is 18486443. The next prime is 18486451. The reversal of 18486444 is 44468481.

It is a super-2 number, since 2×18486444² = 683497223530272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18486443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3874 + ... + 7209.

Almost surely, 2^18486444 is an apocalyptic number.

It is an amenable number.

18486444 is an abundant number, since it is smaller than the sum of its proper divisors (24962836).

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

18486444 is a wasteful number, since it uses less digits than its factorization.

18486444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11229 (or 11227 counting only the distinct ones).

The product of its digits is 98304, while the sum is 39.

The square root of 18486444 is about 4299.5864917455. The cubic root of 18486444 is about 264.4140083502.

The spelling of 18486444 in words is "eighteen million, four hundred eighty-six thousand, four hundred forty-four".