18475020 has 48 divisors (see below), whose sum is σ = 57479520. Its totient is φ = 4926528.

The previous prime is 18474991. The next prime is 18475031. The reversal of 18475020 is 2057481.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16567 + ... + 17646.

It is an arithmetic number, because the mean of its divisors is an integer number (1197490).

Almost surely, 2^18475020 is an apocalyptic number.

18475020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18475020 is an abundant number, since it is smaller than the sum of its proper divisors (39004500).

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

18475020 is a wasteful number, since it uses less digits than its factorization.

18475020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34231 (or 34223 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 18475020 is about 4298.2577865921. The cubic root of 18475020 is about 264.3595308086.

The spelling of 18475020 in words is "eighteen million, four hundred seventy-five thousand, twenty".