18478680 has 64 divisors (see below), whose sum is σ = 60480000. Its totient is φ = 4479360.

The previous prime is 18478679. The next prime is 18478693. The reversal of 18478680 is 8687481.

It is a super-2 number, since 2×18478680² = 682923229084800, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 5680 + ... + 8319.

It is an arithmetic number, because the mean of its divisors is an integer number (945000).

Almost surely, 2^18478680 is an apocalyptic number.

18478680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18478680 is an abundant number, since it is smaller than the sum of its proper divisors (42001320).

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

18478680 is a wasteful number, since it uses less digits than its factorization.

18478680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14024 (or 14020 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 18478680 is about 4298.6835194045. The cubic root of 18478680 is about 264.3769866669.

The spelling of 18478680 in words is "eighteen million, four hundred seventy-eight thousand, six hundred eighty".