22918629321 has 99 divisors (see below), whose sum is σ = 40444823271. Its totient is φ = 12949209504.

The previous prime is 22918629301. The next prime is 22918629329. The reversal of 22918629321 is 12392681922.

The square root of 22918629321 is 151389.

It is a perfect power (a square), and thus also a powerful number.

22918629321 is a `hidden beast` number, since 2 + 2 + 9 + 18 + 629 + 3 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4400862921 + 18517766400 = 66339^2 + 136080^2 .

It is not a de Polignac number, because 22918629321 - 2¹¹ = 22918627273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22918629329) by changing a digit.

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 98 ways as a sum of consecutive naturals, for example, 257512645 + ... + 257512733.

Almost surely, 2^22918629321 is an apocalyptic number.

22918629321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22918629321 is the 151389-th square number.

22918629321 is the 75695-th centered octagonal number.

It is an amenable number.

22918629321 is a deficient number, since it is larger than the sum of its proper divisors (17526193950).

22918629321 is an frugal number, since it uses more digits than its factorization.

22918629321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 99 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The spelling of 22918629321 in words is "twenty-two billion, nine hundred eighteen million, six hundred twenty-nine thousand, three hundred twenty-one".