18618672 has 40 divisors (see below), whose sum is σ = 50929776. Its totient is φ = 5840896.

The previous prime is 18618653. The next prime is 18618673. The reversal of 18618672 is 27681681.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18618672.

It is not an unprimeable number, because it can be changed into a prime (18618673) 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, 10593 + ... + 12224.

Almost surely, 2^18618672 is an apocalyptic number.

18618672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18618672 is an abundant number, since it is smaller than the sum of its proper divisors (32311104).

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

18618672 is a wasteful number, since it uses less digits than its factorization.

18618672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22845 (or 22839 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 18618672 is about 4314.9359207293. The cubic root of 18618672 is about 265.0429359646.

The spelling of 18618672 in words is "eighteen million, six hundred eighteen thousand, six hundred seventy-two".