31022244020 has 24 divisors (see below), whose sum is σ = 65583945000. Its totient is φ = 12325615232.

The previous prime is 31022243981. The next prime is 31022244023. The reversal of 31022244020 is 2044222013.

It can be written as a sum of positive squares in 4 ways, for example, as 177049636 + 30845194384 = 13306^2 + 175628^2 .

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 = 31022243983 and 31022244001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31022244023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5202095 + ... + 5208054.

It is an arithmetic number, because the mean of its divisors is an integer number (2732664375).

Almost surely, 2^31022244020 is an apocalyptic number.

It is an amenable number.

31022244020 is an abundant number, since it is smaller than the sum of its proper divisors (34561700980).

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

31022244020 is a wasteful number, since it uses less digits than its factorization.

31022244020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10410307 (or 10410305 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 31022244020 its reverse (2044222013), we get a palindrome (33066466033).

The spelling of 31022244020 in words is "thirty-one billion, twenty-two million, two hundred forty-four thousand, twenty".