18319039116 has 96 divisors (see below), whose sum is σ = 50757504000. Its totient is φ = 5031307008.

The previous prime is 18319039049. The next prime is 18319039171. The reversal of 18319039116 is 61193091381.

It is a super-2 number, since 2×18319039116² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 541425 + ... + 574263.

It is an arithmetic number, because the mean of its divisors is an integer number (528724000).

Almost surely, 2^18319039116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18319039116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25378752000).

18319039116 is an abundant number, since it is smaller than the sum of its proper divisors (32438464884).

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

18319039116 is a wasteful number, since it uses less digits than its factorization.

18319039116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33111 (or 33109 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 42.

The spelling of 18319039116 in words is "eighteen billion, three hundred nineteen million, thirty-nine thousand, one hundred sixteen".