18438183696 has 80 divisors (see below), whose sum is σ = 48171402944. Its totient is φ = 6076588032.

The previous prime is 18438183679. The next prime is 18438183713. The reversal of 18438183696 is 69638183481.

It is an interprime number because it is at equal distance from previous prime (18438183679) and next prime (18438183713).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9250476 + ... + 9252468.

Almost surely, 2^18438183696 is an apocalyptic number.

18438183696 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 18438183696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24085701472).

18438183696 is an abundant number, since it is smaller than the sum of its proper divisors (29733219248).

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

18438183696 is a wasteful number, since it uses less digits than its factorization.

18438183696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088 (or 4082 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 57.

The spelling of 18438183696 in words is "eighteen billion, four hundred thirty-eight million, one hundred eighty-three thousand, six hundred ninety-six".