22001222020 has 24 divisors (see below), whose sum is σ = 46205775000. Its totient is φ = 8799877632.

The previous prime is 22001222003. The next prime is 22001222039. The reversal of 22001222020 is 2022210022.

It can be written as a sum of positive squares in 4 ways, for example, as 622103364 + 21379118656 = 24942^2 + 146216^2 .

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, 356406 + ... + 413554.

It is an arithmetic number, because the mean of its divisors is an integer number (1925240625).

Almost surely, 2^22001222020 is an apocalyptic number.

22001222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22001222020 is an abundant number, since it is smaller than the sum of its proper divisors (24204552980).

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

22001222020 is a wasteful number, since it uses less digits than its factorization.

22001222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76407 (or 76405 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 22001222020 its reverse (2022210022), we get a palindrome (24023432042).

The spelling of 22001222020 in words is "twenty-two billion, one million, two hundred twenty-two thousand, twenty".