18008936280 has 64 divisors (see below), whose sum is σ = 60029791200. Its totient is φ = 4802382720.

The previous prime is 18008936263. The next prime is 18008936293. The reversal of 18008936280 is 8263980081.

18008936280 is a `hidden beast` number, since 18 + 0 + 0 + 8 + 9 + 3 + 628 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 8336391 + ... + 8338550.

Almost surely, 2^18008936280 is an apocalyptic number.

18008936280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18008936280 is an abundant number, since it is smaller than the sum of its proper divisors (42020854920).

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

18008936280 is a wasteful number, since it uses less digits than its factorization.

18008936280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16674961 (or 16674951 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 18008936280 in words is "eighteen billion, eight million, nine hundred thirty-six thousand, two hundred eighty".