18749320896 has 112 divisors (see below), whose sum is σ = 50520006656. Its totient is φ = 6135865344.

The previous prime is 18749320861. The next prime is 18749320921. The reversal of 18749320896 is 69802394781.

It is a super-2 number, since 2×18749320896² (a number of 21 digits) contains 22 as substring.

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, 2361285 + ... + 2369211.

It is an arithmetic number, because the mean of its divisors is an integer number (451071488).

Almost surely, 2^18749320896 is an apocalyptic number.

18749320896 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 18749320896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25260003328).

18749320896 is an abundant number, since it is smaller than the sum of its proper divisors (31770685760).

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

18749320896 is a wasteful number, since it uses less digits than its factorization.

18749320896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8166 (or 8156 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 18749320896 in words is "eighteen billion, seven hundred forty-nine million, three hundred twenty thousand, eight hundred ninety-six".