18974072 has 16 divisors (see below), whose sum is σ = 38313240. Its totient is φ = 8757216.

The previous prime is 18974071. The next prime is 18974093. The reversal of 18974072 is 27047981.

It is a super-2 number, since 2×18974072² = 720030816522368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18974071) 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, 91118 + ... + 91325.

Almost surely, 2^18974072 is an apocalyptic number.

It is an amenable number.

18974072 is an abundant number, since it is smaller than the sum of its proper divisors (19339168).

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

18974072 is a wasteful number, since it uses less digits than its factorization.

18974072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182462 (or 182458 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 18974072 is about 4355.9237826206. The cubic root of 18974072 is about 266.7187301124.

The spelling of 18974072 in words is "eighteen million, nine hundred seventy-four thousand, seventy-two".