18288972280 has 16 divisors (see below), whose sum is σ = 41150187720. Its totient is φ = 7315588896.

The previous prime is 18288972277. The next prime is 18288972311. The reversal of 18288972280 is 8227988281.

It is a congruent number.

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, 228612114 + ... + 228612193.

Almost surely, 2^18288972280 is an apocalyptic number.

18288972280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18288972280 is an abundant number, since it is smaller than the sum of its proper divisors (22861215440).

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

18288972280 is a wasteful number, since it uses less digits than its factorization.

18288972280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457224318 (or 457224314 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 55.

The spelling of 18288972280 in words is "eighteen billion, two hundred eighty-eight million, nine hundred seventy-two thousand, two hundred eighty".