31920130036 has 24 divisors (see below), whose sum is σ = 62259079680. Its totient is φ = 14230645632.

The previous prime is 31920129953. The next prime is 31920130069. The reversal of 31920130036 is 63003102913.

It is a super-2 number, since 2×31920130036² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31920129986 and 31920130013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12351700 + ... + 12354283.

It is an arithmetic number, because the mean of its divisors is an integer number (2594128320).

Almost surely, 2^31920130036 is an apocalyptic number.

It is an amenable number.

31920130036 is a deficient number, since it is larger than the sum of its proper divisors (30338949644).

31920130036 is a wasteful number, since it uses less digits than its factorization.

31920130036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24706023 (or 24706021 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 28.

Adding to 31920130036 its reverse (63003102913), we get a palindrome (94923232949).

The spelling of 31920130036 in words is "thirty-one billion, nine hundred twenty million, one hundred thirty thousand, thirty-six".