31620330420 has 96 divisors (see below), whose sum is σ = 101221091328. Its totient is φ = 7224930432.

The previous prime is 31620330419. The next prime is 31620330431. The reversal of 31620330420 is 2403302613.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1326729 + ... + 1350351.

It is an arithmetic number, because the mean of its divisors is an integer number (1054386368).

Almost surely, 2^31620330420 is an apocalyptic number.

31620330420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31620330420 is an abundant number, since it is smaller than the sum of its proper divisors (69600760908).

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

31620330420 is a wasteful number, since it uses less digits than its factorization.

31620330420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26829 (or 26827 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The spelling of 31620330420 in words is "thirty-one billion, six hundred twenty million, three hundred thirty thousand, four hundred twenty".