18047900 has 36 divisors (see below), whose sum is σ = 42179592. Its totient is φ = 6663360.

The previous prime is 18047851. The next prime is 18047903. The reversal of 18047900 is 974081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18047903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5642 + ... + 8241.

Almost surely, 2^18047900 is an apocalyptic number.

18047900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18047900 is an abundant number, since it is smaller than the sum of its proper divisors (24131692).

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

18047900 is a wasteful number, since it uses less digits than its factorization.

18047900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13910 (or 13903 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 18047900 is about 4248.2820057054. The cubic root of 18047900 is about 262.3064029843.

The spelling of 18047900 in words is "eighteen million, forty-seven thousand, nine hundred".