31320323020 has 48 divisors (see below), whose sum is σ = 75202666560. Its totient is φ = 10733554944.

The previous prime is 31320323011. The next prime is 31320323107. The reversal of 31320323020 is 2032302313.

It is a happy number.

It is a super-3 number, since 3×31320323020³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268362 + ... + 366958.

It is an arithmetic number, because the mean of its divisors is an integer number (1566722220).

Almost surely, 2^31320323020 is an apocalyptic number.

It is an amenable number.

31320323020 is an abundant number, since it is smaller than the sum of its proper divisors (43882343540).

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

31320323020 is a wasteful number, since it uses less digits than its factorization.

31320323020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100882 (or 100880 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 31320323020 its reverse (2032302313), we get a palindrome (33352625333).

The spelling of 31320323020 in words is "thirty-one billion, three hundred twenty million, three hundred twenty-three thousand, twenty".