18087370 has 24 divisors (see below), whose sum is σ = 37873764. Its totient is φ = 6201216.

The previous prime is 18087347. The next prime is 18087389. The reversal of 18087370 is 7378081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16654561 + 1432809 = 4081^2 + 1197^2 .

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, 17967 + ... + 18946.

Almost surely, 2^18087370 is an apocalyptic number.

18087370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18087370 is an abundant number, since it is smaller than the sum of its proper divisors (19786394).

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

18087370 is a wasteful number, since it uses less digits than its factorization.

18087370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36934 (or 36927 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 18087370 is about 4252.9248758942. The cubic root of 18087370 is about 262.4974814573.

The spelling of 18087370 in words is "eighteen million, eighty-seven thousand, three hundred seventy".