18247137312 has 96 divisors (see below), whose sum is σ = 50551300800. Its totient is φ = 5747217408.

The previous prime is 18247137263. The next prime is 18247137313. The reversal of 18247137312 is 21373174281.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (18247137313) 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, 696678 + ... + 722394.

It is an arithmetic number, because the mean of its divisors is an integer number (526576050).

Almost surely, 2^18247137312 is an apocalyptic number.

18247137312 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 18247137312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25275650400).

18247137312 is an abundant number, since it is smaller than the sum of its proper divisors (32304163488).

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

18247137312 is a wasteful number, since it uses less digits than its factorization.

18247137312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26138 (or 26130 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The spelling of 18247137312 in words is "eighteen billion, two hundred forty-seven million, one hundred thirty-seven thousand, three hundred twelve".