18840199072 has 24 divisors (see below), whose sum is σ = 37720317600. Its totient is φ = 9260435904.

The previous prime is 18840199039. The next prime is 18840199097. The reversal of 18840199072 is 27099104881.

It is a super-2 number, since 2×18840199072² (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 3 ways as a sum of consecutive naturals, for example, 4987572 + ... + 4991347.

It is an arithmetic number, because the mean of its divisors is an integer number (1571679900).

Almost surely, 2^18840199072 is an apocalyptic number.

It is an amenable number.

18840199072 is an abundant number, since it is smaller than the sum of its proper divisors (18880118528).

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

18840199072 is an equidigital number, since it uses as much as digits as its factorization.

18840199072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9978988 (or 9978980 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 49.

The spelling of 18840199072 in words is "eighteen billion, eight hundred forty million, one hundred ninety-nine thousand, seventy-two".