18712347860 has 24 divisors (see below), whose sum is σ = 39326423136. Its totient is φ = 7479131040.

The previous prime is 18712347827. The next prime is 18712347869. The reversal of 18712347860 is 6874321781.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18712347869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336542 + ... + 388181.

It is an arithmetic number, because the mean of its divisors is an integer number (1638600964).

Almost surely, 2^18712347860 is an apocalyptic number.

18712347860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18712347860 is an abundant number, since it is smaller than the sum of its proper divisors (20614075276).

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

18712347860 is a wasteful number, since it uses less digits than its factorization.

18712347860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726023 (or 726021 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 18712347860 in words is "eighteen billion, seven hundred twelve million, three hundred forty-seven thousand, eight hundred sixty".