15318213912 has 160 divisors (see below), whose sum is σ = 43960229280. Its totient is φ = 4981616640.

The previous prime is 15318213901. The next prime is 15318213941. The reversal of 15318213912 is 21931281351.

15318213912 is a `hidden beast` number, since 1 + 531 + 82 + 1 + 39 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6627237 + ... + 6629547.

It is an arithmetic number, because the mean of its divisors is an integer number (274751433).

Almost surely, 2^15318213912 is an apocalyptic number.

15318213912 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 15318213912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21980114640).

15318213912 is an abundant number, since it is smaller than the sum of its proper divisors (28642015368).

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

15318213912 is a wasteful number, since it uses less digits than its factorization.

15318213912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575 (or 2562 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The spelling of 15318213912 in words is "fifteen billion, three hundred eighteen million, two hundred thirteen thousand, nine hundred twelve".