18472520 has 32 divisors (see below), whose sum is σ = 45342720. Its totient is φ = 6717120.

The previous prime is 18472511. The next prime is 18472529. The reversal of 18472520 is 2527481.

It is an interprime number because it is at equal distance from previous prime (18472511) and next prime (18472529).

It is not an unprimeable number, because it can be changed into a prime (18472529) 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, 20552 + ... + 21431.

It is an arithmetic number, because the mean of its divisors is an integer number (1416960).

Almost surely, 2^18472520 is an apocalyptic number.

18472520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18472520 is an abundant number, since it is smaller than the sum of its proper divisors (26870200).

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

18472520 is a wasteful number, since it uses less digits than its factorization.

18472520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42005 (or 42001 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 18472520 is about 4297.9669612504. The cubic root of 18472520 is about 264.3476060828.

The spelling of 18472520 in words is "eighteen million, four hundred seventy-two thousand, five hundred twenty".