18407281620 has 96 divisors (see below), whose sum is σ = 63434343168. Its totient is φ = 3883732992.

The previous prime is 18407281609. The next prime is 18407281637. The reversal of 18407281620 is 2618270481.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1680189 + ... + 1691108.

It is an arithmetic number, because the mean of its divisors is an integer number (660774408).

Almost surely, 2^18407281620 is an apocalyptic number.

18407281620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18407281620 is an abundant number, since it is smaller than the sum of its proper divisors (45027061548).

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

18407281620 is a wasteful number, since it uses less digits than its factorization.

18407281620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3371329 (or 3371327 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The spelling of 18407281620 in words is "eighteen billion, four hundred seven million, two hundred eighty-one thousand, six hundred twenty".