31330422020 has 48 divisors (see below), whose sum is σ = 71644910400. Its totient is φ = 11463177600.

The previous prime is 31330421989. The next prime is 31330422113. The reversal of 31330422020 is 2022403313.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31330421983 and 31330422001.

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, 1410506 + ... + 1432545.

It is an arithmetic number, because the mean of its divisors is an integer number (1492602300).

Almost surely, 2^31330422020 is an apocalyptic number.

It is an amenable number.

31330422020 is an abundant number, since it is smaller than the sum of its proper divisors (40314488380).

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

31330422020 is a wasteful number, since it uses less digits than its factorization.

31330422020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843108 (or 2843106 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 31330422020 its reverse (2022403313), we get a palindrome (33352825333).

The spelling of 31330422020 in words is "thirty-one billion, three hundred thirty million, four hundred twenty-two thousand, twenty".