18419979312 has 120 divisors (see below), whose sum is σ = 61096811776. Its totient is φ = 5262843456.

The previous prime is 18419979307. The next prime is 18419979317. The reversal of 18419979312 is 21397991481.

It is an interprime number because it is at equal distance from previous prime (18419979307) and next prime (18419979317).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (18419979317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311188 + ... + 365619.

Almost surely, 2^18419979312 is an apocalyptic number.

18419979312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18419979312 is an abundant number, since it is smaller than the sum of its proper divisors (42676832464).

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

18419979312 is an equidigital number, since it uses as much as digits as its factorization.

18419979312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676837 (or 676819 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The spelling of 18419979312 in words is "eighteen billion, four hundred nineteen million, nine hundred seventy-nine thousand, three hundred twelve".