31820580992 has 24 divisors (see below), whose sum is σ = 63396584535. Its totient is φ = 15909281408.

The previous prime is 31820580947. The next prime is 31820581043. The reversal of 31820580992 is 29908502813.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 15910290496 + 15910290496 = 126136^2 + 126136^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=126136.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2010293 + ... + 2026059.

Almost surely, 2^31820580992 is an apocalyptic number.

31820580992 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31820580992 is a deficient number, since it is larger than the sum of its proper divisors (31576003543).

31820580992 is an frugal number, since it uses more digits than its factorization.

31820580992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31548 (or 15769 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 31820580992 in words is "thirty-one billion, eight hundred twenty million, five hundred eighty thousand, nine hundred ninety-two".