22121432020 has 12 divisors (see below), whose sum is σ = 46455007284. Its totient is φ = 8848572800.

The previous prime is 22121431999. The next prime is 22121432023. The reversal of 22121432020 is 2023412122.

It can be written as a sum of positive squares in 2 ways, for example, as 12915413316 + 9206018704 = 113646^2 + 95948^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121432023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553035781 + ... + 553035820.

It is an arithmetic number, because the mean of its divisors is an integer number (3871250607).

Almost surely, 2^22121432020 is an apocalyptic number.

22121432020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121432020 is an abundant number, since it is smaller than the sum of its proper divisors (24333575264).

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

22121432020 is a wasteful number, since it uses less digits than its factorization.

22121432020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106071610 (or 1106071608 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22121432020 its reverse (2023412122), we get a palindrome (24144844142).

The spelling of 22121432020 in words is "twenty-two billion, one hundred twenty-one million, four hundred thirty-two thousand, twenty".