18968272 has 30 divisors (see below), whose sum is σ = 37956338. Its totient is φ = 9176256.

The previous prime is 18968231. The next prime is 18968317. The reversal of 18968272 is 27286981.

It can be written as a sum of positive squares in only one way, i.e., 18455616 + 512656 = 4296^2 + 716^2 .

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 105879 + ... + 106057.

Almost surely, 2^18968272 is an apocalyptic number.

It is an amenable number.

18968272 is an abundant number, since it is smaller than the sum of its proper divisors (18988066).

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

18968272 is an equidigital number, since it uses as much as digits as its factorization.

18968272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 218 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 18968272 is about 4355.2579716935. The cubic root of 18968272 is about 266.6915504557.

The spelling of 18968272 in words is "eighteen million, nine hundred sixty-eight thousand, two hundred seventy-two".