18712480 has 24 divisors (see below), whose sum is σ = 44208612. Its totient is φ = 7484928.

The previous prime is 18712471. The next prime is 18712483. The reversal of 18712480 is 8421781.

It can be written as a sum of positive squares in 2 ways, for example, as 17338896 + 1373584 = 4164^2 + 1172^2 .

It is not an unprimeable number, because it can be changed into a prime (18712483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58317 + ... + 58636.

Almost surely, 2^18712480 is an apocalyptic number.

18712480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18712480 is an abundant number, since it is smaller than the sum of its proper divisors (25496132).

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

18712480 is a wasteful number, since it uses less digits than its factorization.

18712480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116968 (or 116960 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 18712480 is about 4325.7924129574. The cubic root of 18712480 is about 265.4873197449.

The spelling of 18712480 in words is "eighteen million, seven hundred twelve thousand, four hundred eighty".