31323233020 has 24 divisors (see below), whose sum is σ = 66430068768. Its totient is φ = 12405240000.

The previous prime is 31323232991. The next prime is 31323233107. The reversal of 31323233020 is 2033232313.

It is a super-2 number, since 2×31323233020² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31323232982 and 31323233000.

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, 7751256 + ... + 7755295.

It is an arithmetic number, because the mean of its divisors is an integer number (2767919532).

Almost surely, 2^31323233020 is an apocalyptic number.

It is an amenable number.

31323233020 is an abundant number, since it is smaller than the sum of its proper divisors (35106835748).

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

31323233020 is a wasteful number, since it uses less digits than its factorization.

31323233020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15506661 (or 15506659 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 31323233020 its reverse (2033232313), we get a palindrome (33356465333).

The spelling of 31323233020 in words is "thirty-one billion, three hundred twenty-three million, two hundred thirty-three thousand, twenty".