31132422020 has 48 divisors (see below), whose sum is σ = 75030520320. Its totient is φ = 10629300864.

The previous prime is 31132422019. The next prime is 31132422023. The reversal of 31132422020 is 2022423113.

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 = 31132421983 and 31132422001.

It is not an unprimeable number, because it can be changed into a prime (31132422023) by changing a digit.

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, 431759 + ... + 498678.

It is an arithmetic number, because the mean of its divisors is an integer number (1563135840).

Almost surely, 2^31132422020 is an apocalyptic number.

It is an amenable number.

31132422020 is an abundant number, since it is smaller than the sum of its proper divisors (43898098300).

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

31132422020 is a wasteful number, since it uses less digits than its factorization.

31132422020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930692 (or 930690 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31132422020 its reverse (2022423113), we get a palindrome (33154845133).

The spelling of 31132422020 in words is "thirty-one billion, one hundred thirty-two million, four hundred twenty-two thousand, twenty".