31182020112 has 20 divisors (see below), whose sum is σ = 80553552080. Its totient is φ = 10394006688.

The previous prime is 31182020099. The next prime is 31182020113. The reversal of 31182020112 is 21102028113.

It is not an unprimeable number, because it can be changed into a prime (31182020113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324812662 + ... + 324812757.

It is an arithmetic number, because the mean of its divisors is an integer number (4027677604).

Almost surely, 2^31182020112 is an apocalyptic number.

It is an amenable number.

31182020112 is an abundant number, since it is smaller than the sum of its proper divisors (49371531968).

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

31182020112 is a wasteful number, since it uses less digits than its factorization.

31182020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649625430 (or 649625424 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 31182020112 its reverse (21102028113), we get a palindrome (52284048225).

The spelling of 31182020112 in words is "thirty-one billion, one hundred eighty-two million, twenty thousand, one hundred twelve".