18993867296 has 48 divisors (see below), whose sum is σ = 38368608768. Its totient is φ = 9250214400.

The previous prime is 18993867283. The next prime is 18993867317. The reversal of 18993867296 is 69276839981.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 816401 + ... + 839343.

It is an arithmetic number, because the mean of its divisors is an integer number (799346016).

Almost surely, 2^18993867296 is an apocalyptic number.

18993867296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18993867296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19184304384).

18993867296 is an abundant number, since it is smaller than the sum of its proper divisors (19374741472).

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

18993867296 is a wasteful number, since it uses less digits than its factorization.

18993867296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23625 (or 23617 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 68.

The spelling of 18993867296 in words is "eighteen billion, nine hundred ninety-three million, eight hundred sixty-seven thousand, two hundred ninety-six".