22045023021 has 96 divisors (see below), whose sum is σ = 36330577920. Its totient is φ = 11839976064.

The previous prime is 22045023019. The next prime is 22045023029. The reversal of 22045023021 is 12032054022.

It is not a de Polignac number, because 22045023021 - 2¹ = 22045023019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22045023029) 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 95 ways as a sum of consecutive naturals, for example, 21217020 + ... + 21218058.

It is an arithmetic number, because the mean of its divisors is an integer number (378443520).

Almost surely, 2^22045023021 is an apocalyptic number.

22045023021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22045023021 is a deficient number, since it is larger than the sum of its proper divisors (14285554899).

22045023021 is a wasteful number, since it uses less digits than its factorization.

22045023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223 (or 1216 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 22045023021 its reverse (12032054022), we get a palindrome (34077077043).

The spelling of 22045023021 in words is "twenty-two billion, forty-five million, twenty-three thousand, twenty-one".