16818972 has 24 divisors (see below), whose sum is σ = 39310992. Its totient is φ = 5596800.

The previous prime is 16818961. The next prime is 16818983. The reversal of 16818972 is 27981861.

It is an interprime number because it is at equal distance from previous prime (16818961) and next prime (16818983).

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, 12072 + ... + 13392.

It is an arithmetic number, because the mean of its divisors is an integer number (1637958).

Almost surely, 2^16818972 is an apocalyptic number.

16818972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16818972 is an abundant number, since it is smaller than the sum of its proper divisors (22492020).

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

16818972 is a wasteful number, since it uses less digits than its factorization.

16818972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2389 (or 2387 counting only the distinct ones).

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

The square root of 16818972 is about 4101.0940003858. The cubic root of 16818972 is about 256.2122060462.

The spelling of 16818972 in words is "sixteen million, eight hundred eighteen thousand, nine hundred seventy-two".