18840157072 has 80 divisors (see below), whose sum is σ = 41641620480. Its totient is φ = 8173827200.

The previous prime is 18840157069. The next prime is 18840157073. The reversal of 18840157072 is 27075104881.

It is a super-2 number, since 2×18840157072² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18840157073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1982829 + ... + 1992307.

It is an arithmetic number, because the mean of its divisors is an integer number (520520256).

Almost surely, 2^18840157072 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 18840157072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20820810240).

18840157072 is an abundant number, since it is smaller than the sum of its proper divisors (22801463408).

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

18840157072 is a wasteful number, since it uses less digits than its factorization.

18840157072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10012 (or 10006 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 43.

The spelling of 18840157072 in words is "eighteen billion, eight hundred forty million, one hundred fifty-seven thousand, seventy-two".