18622438604 has 48 divisors (see below), whose sum is σ = 40659978240. Its totient is φ = 7250280960.

The previous prime is 18622438573. The next prime is 18622438621. The reversal of 18622438604 is 40683422681.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 422204 + ... + 464220.

It is an arithmetic number, because the mean of its divisors is an integer number (847082880).

Almost surely, 2^18622438604 is an apocalyptic number.

18622438604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18622438604 is an abundant number, since it is smaller than the sum of its proper divisors (22037539636).

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

18622438604 is a wasteful number, since it uses less digits than its factorization.

18622438604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43478 (or 43476 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The spelling of 18622438604 in words is "eighteen billion, six hundred twenty-two million, four hundred thirty-eight thousand, six hundred four".