18272970 has 48 divisors (see below), whose sum is σ = 47803392. Its totient is φ = 4842720.

The previous prime is 18272959. The next prime is 18272983. The reversal of 18272970 is 7927281.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16659 + ... + 17721.

It is an arithmetic number, because the mean of its divisors is an integer number (995904).

Almost surely, 2^18272970 is an apocalyptic number.

18272970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18272970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23901696).

18272970 is an abundant number, since it is smaller than the sum of its proper divisors (29530422).

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

18272970 is a wasteful number, since it uses less digits than its factorization.

18272970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267 (or 1264 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 18272970 is about 4274.6894624054. The cubic root of 18272970 is about 263.3922832649.

The spelling of 18272970 in words is "eighteen million, two hundred seventy-two thousand, nine hundred seventy".