18972168 has 32 divisors (see below), whose sum is σ = 47621760. Its totient is φ = 6298560.

The previous prime is 18972137. The next prime is 18972169. The reversal of 18972168 is 86127981.

It is not an unprimeable number, because it can be changed into a prime (18972169) 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, 5046 + ... + 7962.

It is an arithmetic number, because the mean of its divisors is an integer number (1488180).

Almost surely, 2^18972168 is an apocalyptic number.

It is an amenable number.

18972168 is an abundant number, since it is smaller than the sum of its proper divisors (28649592).

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

18972168 is a wasteful number, since it uses less digits than its factorization.

18972168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3197 (or 3193 counting only the distinct ones).

The product of its digits is 48384, while the sum is 42.

The square root of 18972168 is about 4355.7052241859. The cubic root of 18972168 is about 266.7098082979.

The spelling of 18972168 in words is "eighteen million, nine hundred seventy-two thousand, one hundred sixty-eight".