18690012880 has 80 divisors (see below), whose sum is σ = 54176782464. Its totient is φ = 5825456640.

The previous prime is 18690012863. The next prime is 18690012917. The reversal of 18690012880 is 8821009681.

It is a tau number, because it is divible by the number of its divisors (80).

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, 1510887 + ... + 1523206.

Almost surely, 2^18690012880 is an apocalyptic number.

18690012880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18690012880 is an abundant number, since it is smaller than the sum of its proper divisors (35486769584).

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

18690012880 is a wasteful number, since it uses less digits than its factorization.

18690012880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3034124 (or 3034118 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 43.

The spelling of 18690012880 in words is "eighteen billion, six hundred ninety million, twelve thousand, eight hundred eighty".