18841872 has 60 divisors (see below), whose sum is σ = 56628816. Its totient is φ = 5382720.

The previous prime is 18841859. The next prime is 18841873. The reversal of 18841872 is 27814881.

It is a happy number.

It is a super-2 number, since 2×18841872² = 710032280928768, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 18841872.

It is not an unprimeable number, because it can be changed into a prime (18841873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1654 + ... + 6357.

Almost surely, 2^18841872 is an apocalyptic number.

18841872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18841872 is an abundant number, since it is smaller than the sum of its proper divisors (37786944).

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

18841872 is a wasteful number, since it uses less digits than its factorization.

18841872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8036 (or 8023 counting only the distinct ones).

The product of its digits is 28672, while the sum is 39.

The square root of 18841872 is about 4340.7225205028. The cubic root of 18841872 is about 266.0978402775.

The spelling of 18841872 in words is "eighteen million, eight hundred forty-one thousand, eight hundred seventy-two".