18972248 has 32 divisors (see below), whose sum is σ = 37100160. Its totient is φ = 9085440.

The previous prime is 18972229. The next prime is 18972269. The reversal of 18972248 is 84227981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27686 + ... + 28362.

It is an arithmetic number, because the mean of its divisors is an integer number (1159380).

Almost surely, 2^18972248 is an apocalyptic number.

It is an amenable number.

18972248 is a deficient number, since it is larger than the sum of its proper divisors (18127912).

18972248 is a wasteful number, since it uses less digits than its factorization.

18972248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827 (or 823 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 18972248 is about 4355.7144075341. The cubic root of 18972248 is about 266.7101831761.

The spelling of 18972248 in words is "eighteen million, nine hundred seventy-two thousand, two hundred forty-eight".