18864488280 has 128 divisors (see below), whose sum is σ = 63730022400. Its totient is φ = 4425676800.

The previous prime is 18864488173. The next prime is 18864488281. The reversal of 18864488280 is 8288446881.

It is a self number, because there is not a number n which added to its sum of digits gives 18864488280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18864488281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 189585 + ... + 271424.

It is an arithmetic number, because the mean of its divisors is an integer number (497890800).

Almost surely, 2^18864488280 is an apocalyptic number.

18864488280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18864488280 is an abundant number, since it is smaller than the sum of its proper divisors (44865534120).

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

18864488280 is a wasteful number, since it uses less digits than its factorization.

18864488280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461065 (or 461061 counting only the distinct ones).

The product of its (nonzero) digits is 6291456, while the sum is 57.

The spelling of 18864488280 in words is "eighteen billion, eight hundred sixty-four million, four hundred eighty-eight thousand, two hundred eighty".