22021530345 has 20 divisors (see below), whose sum is σ = 39475632900. Its totient is φ = 11744815968.

The previous prime is 22021530337. The next prime is 22021530361. The reversal of 22021530345 is 54303512022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16119603369 + 5901926976 = 126963^2 + 76824^2 .

It is not a de Polignac number, because 22021530345 - 2³ = 22021530337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27186670 + ... + 27187479.

It is an arithmetic number, because the mean of its divisors is an integer number (1973781645).

Almost surely, 2^22021530345 is an apocalyptic number.

It is an amenable number.

22021530345 is a deficient number, since it is larger than the sum of its proper divisors (17454102555).

22021530345 is an equidigital number, since it uses as much as digits as its factorization.

22021530345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54374166 (or 54374157 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The spelling of 22021530345 in words is "twenty-two billion, twenty-one million, five hundred thirty thousand, three hundred forty-five".