31720892472 has 96 divisors (see below), whose sum is σ = 86320690560. Its totient is φ = 10523304000.

The previous prime is 31720892471. The next prime is 31720892527. The reversal of 31720892472 is 27429802713.

31720892472 is a `hidden beast` number, since 3 + 172 + 0 + 8 + 9 + 2 + 472 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31720892471) 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 23 ways as a sum of consecutive naturals, for example, 24570147 + ... + 24571437.

It is an arithmetic number, because the mean of its divisors is an integer number (899173860).

Almost surely, 2^31720892472 is an apocalyptic number.

It is an amenable number.

31720892472 is an abundant number, since it is smaller than the sum of its proper divisors (54599798088).

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

31720892472 is a wasteful number, since it uses less digits than its factorization.

31720892472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665 (or 2658 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 31720892472 in words is "thirty-one billion, seven hundred twenty million, eight hundred ninety-two thousand, four hundred seventy-two".