31854634812 has 432 divisors, whose sum is σ = 113050540512. Its totient is φ = 7428879360.

The previous prime is 31854634793. The next prime is 31854634961. The reversal of 31854634812 is 21843645813.

31854634812 is a `hidden beast` number, since 3 + 1 + 8 + 5 + 4 + 634 + 8 + 1 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 9331618 + ... + 9335030.

It is an arithmetic number, because the mean of its divisors is an integer number (261691066).

Almost surely, 2^31854634812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31854634812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56525270256).

31854634812 is an abundant number, since it is smaller than the sum of its proper divisors (81195905700).

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

31854634812 is a wasteful number, since it uses less digits than its factorization.

31854634812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3498 (or 3486 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

It can be divided in two parts, 31854 and 634812, that added together give a palindrome (666666).

The spelling of 31854634812 in words is "thirty-one billion, eight hundred fifty-four million, six hundred thirty-four thousand, eight hundred twelve".