18477372 has 24 divisors (see below), whose sum is σ = 44989056. Its totient is φ = 5891248.

The previous prime is 18477359. The next prime is 18477383. The reversal of 18477372 is 27377481.

It is a self number, because there is not a number n which added to its sum of digits gives 18477372.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33198 + ... + 33749.

It is an arithmetic number, because the mean of its divisors is an integer number (1874544).

Almost surely, 2^18477372 is an apocalyptic number.

18477372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18477372 is an abundant number, since it is smaller than the sum of its proper divisors (26511684).

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

18477372 is a wasteful number, since it uses less digits than its factorization.

18477372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66977 (or 66975 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 18477372 is about 4298.5313771101. The cubic root of 18477372 is about 264.3707486085.

The spelling of 18477372 in words is "eighteen million, four hundred seventy-seven thousand, three hundred seventy-two".