18972624 has 40 divisors (see below), whose sum is σ = 53469792. Its totient is φ = 5749120.

The previous prime is 18972623. The next prime is 18972637. The reversal of 18972624 is 42627981.

It is a super-2 number, since 2×18972624² = 719920922890752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18972623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17439 + ... + 18494.

Almost surely, 2^18972624 is an apocalyptic number.

It is an amenable number.

18972624 is an abundant number, since it is smaller than the sum of its proper divisors (34497168).

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

18972624 is a wasteful number, since it uses less digits than its factorization.

18972624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35955 (or 35949 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 18972624 is about 4355.7575690114. The cubic root of 18972624 is about 266.7119450893.

The spelling of 18972624 in words is "eighteen million, nine hundred seventy-two thousand, six hundred twenty-four".