31339027920 has 80 divisors (see below), whose sum is σ = 97644286080. Its totient is φ = 8314639872.

The previous prime is 31339027903. The next prime is 31339027931. The reversal of 31339027920 is 2972093313.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284140 + ... + 378699.

It is an arithmetic number, because the mean of its divisors is an integer number (1220553576).

Almost surely, 2^31339027920 is an apocalyptic number.

31339027920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31339027920 is an abundant number, since it is smaller than the sum of its proper divisors (66305258160).

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

31339027920 is a wasteful number, since it uses less digits than its factorization.

31339027920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663052 (or 663046 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 39.

The spelling of 31339027920 in words is "thirty-one billion, three hundred thirty-nine million, twenty-seven thousand, nine hundred twenty".