31636230912 has 720 divisors, whose sum is σ = 113681981952. Its totient is φ = 8622858240.

The previous prime is 31636230911. The next prime is 31636230929. The reversal of 31636230912 is 21903263613.

It is a happy number.

31636230912 is a `hidden beast` number, since 3 + 1 + 636 + 2 + 3 + 0 + 9 + 12 = 666.

It is a super-2 number, since 2×31636230912² (a number of 22 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (31636230911) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 139366543 + ... + 139366769.

Almost surely, 2^31636230912 is an apocalyptic number.

31636230912 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 31636230912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56840990976).

31636230912 is an abundant number, since it is smaller than the sum of its proper divisors (82045751040).

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

31636230912 is a wasteful number, since it uses less digits than its factorization.

31636230912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The spelling of 31636230912 in words is "thirty-one billion, six hundred thirty-six million, two hundred thirty thousand, nine hundred twelve".