21595323223 has 2 divisors, whose sum is σ = 21595323224. Its totient is φ = 21595323222.

The previous prime is 21595323187. The next prime is 21595323229. The reversal of 21595323223 is 32232359512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21595323223 - 2³³ = 13005388631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21595323229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10797661611 + 10797661612.

It is an arithmetic number, because the mean of its divisors is an integer number (10797661612).

Almost surely, 2^21595323223 is an apocalyptic number.

21595323223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21595323223 is an equidigital number, since it uses as much as digits as its factorization.

21595323223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 37.

The spelling of 21595323223 in words is "twenty-one billion, five hundred ninety-five million, three hundred twenty-three thousand, two hundred twenty-three".