22921891393 has 4 divisors (see below), whose sum is σ = 22924409220. Its totient is φ = 22919373568.

The previous prime is 22921891351. The next prime is 22921891417. The reversal of 22921891393 is 39319812922.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2102864449 + 20819026944 = 45857^2 + 144288^2 .

It is a cyclic number.

It is not a de Polignac number, because 22921891393 - 2⁹ = 22921890881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22921891313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1245208 + ... + 1263481.

It is an arithmetic number, because the mean of its divisors is an integer number (5731102305).

Almost surely, 2^22921891393 is an apocalyptic number.

It is an amenable number.

22921891393 is a deficient number, since it is larger than the sum of its proper divisors (2517827).

22921891393 is an equidigital number, since it uses as much as digits as its factorization.

22921891393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517826.

The product of its digits is 419904, while the sum is 49.

The spelling of 22921891393 in words is "twenty-two billion, nine hundred twenty-one million, eight hundred ninety-one thousand, three hundred ninety-three".