31382118912 has 160 divisors (see below), whose sum is σ = 86330135232. Its totient is φ = 10122706944.

The previous prime is 31382118877. The next prime is 31382118913. The reversal of 31382118912 is 21981128313.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31382118913) 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, 11194503 + ... + 11197305.

Almost surely, 2^31382118912 is an apocalyptic number.

31382118912 is a gapful number since it is divisible by the number (32) 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 31382118912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43165067616).

31382118912 is an abundant number, since it is smaller than the sum of its proper divisors (54948016320).

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

31382118912 is a wasteful number, since it uses less digits than its factorization.

31382118912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3058 (or 3042 counting only the distinct ones).

The product of its digits is 20736, while the sum is 39.

The spelling of 31382118912 in words is "thirty-one billion, three hundred eighty-two million, one hundred eighteen thousand, nine hundred twelve".