18475000 has 48 divisors (see below), whose sum is σ = 43356600. Its totient is φ = 7380000.

The previous prime is 18474991. The next prime is 18475031. The reversal of 18475000 is 57481.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24631 + ... + 25369.

Almost surely, 2^18475000 is an apocalyptic number.

18475000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18475000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21678300).

18475000 is an abundant number, since it is smaller than the sum of its proper divisors (24881600).

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

18475000 is an frugal number, since it uses more digits than its factorization.

18475000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 746 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 18475000 is about 4298.2554600675. The cubic root of 18475000 is about 264.3594354150.

The spelling of 18475000 in words is "eighteen million, four hundred seventy-five thousand".