18036680 has 16 divisors (see below), whose sum is σ = 40582620. Its totient is φ = 7214656.

The previous prime is 18036661. The next prime is 18036709. The reversal of 18036680 is 8663081.

It can be written as a sum of positive squares in 2 ways, for example, as 16630084 + 1406596 = 4078^2 + 1186^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225419 + ... + 225498.

Almost surely, 2^18036680 is an apocalyptic number.

18036680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18036680 is an abundant number, since it is smaller than the sum of its proper divisors (22545940).

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

18036680 is a wasteful number, since it uses less digits than its factorization.

18036680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450928 (or 450924 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 18036680 is about 4246.9612665999. The cubic root of 18036680 is about 262.2520349242.

The spelling of 18036680 in words is "eighteen million, thirty-six thousand, six hundred eighty".