18477018 has 48 divisors (see below), whose sum is σ = 47770560. Its totient is φ = 5278392.

The previous prime is 18477007. The next prime is 18477029. The reversal of 18477018 is 81077481.

It is an interprime number because it is at equal distance from previous prime (18477007) and next prime (18477029).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 846 + ... + 6137.

It is an arithmetic number, because the mean of its divisors is an integer number (995220).

Almost surely, 2^18477018 is an apocalyptic number.

18477018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18477018 is an abundant number, since it is smaller than the sum of its proper divisors (29293542).

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

18477018 is a wasteful number, since it uses less digits than its factorization.

18477018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7008 (or 6995 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 18477018 is about 4298.4902000586. The cubic root of 18477018 is about 264.3690602760.

The spelling of 18477018 in words is "eighteen million, four hundred seventy-seven thousand, eighteen".