18704157072 has 80 divisors (see below), whose sum is σ = 49924626048. Its totient is φ = 6030868480.

The previous prime is 18704157047. The next prime is 18704157079. The reversal of 18704157072 is 27075140781.

It is a super-2 number, since 2×18704157072² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18704157079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128848 + ... + 232400.

Almost surely, 2^18704157072 is an apocalyptic number.

18704157072 is a gapful number since it is divisible by the number (12) 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 18704157072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24962313024).

18704157072 is an abundant number, since it is smaller than the sum of its proper divisors (31220468976).

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

18704157072 is a wasteful number, since it uses less digits than its factorization.

18704157072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103688 (or 103682 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 42.

The spelling of 18704157072 in words is "eighteen billion, seven hundred four million, one hundred fifty-seven thousand, seventy-two".