22231312020 has 36 divisors (see below), whose sum is σ = 67434980340. Its totient is φ = 5928349824.

The previous prime is 22231312003. The next prime is 22231312057. The reversal of 22231312020 is 2021313222.

It can be written as a sum of positive squares in 2 ways, for example, as 14047938576 + 8183373444 = 118524^2 + 90462^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22231311984 and 22231312002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61753465 + ... + 61753824.

Almost surely, 2^22231312020 is an apocalyptic number.

22231312020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22231312020 is an abundant number, since it is smaller than the sum of its proper divisors (45203668320).

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

22231312020 is a wasteful number, since it uses less digits than its factorization.

22231312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123507304 (or 123507299 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 22231312020 its reverse (2021313222), we get a palindrome (24252625242).

The spelling of 22231312020 in words is "twenty-two billion, two hundred thirty-one million, three hundred twelve thousand, twenty".