21853448179 has 2 divisors, whose sum is σ = 21853448180. Its totient is φ = 21853448178.

The previous prime is 21853448117. The next prime is 21853448203. The reversal of 21853448179 is 97184435812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21853448179 - 2⁷ = 21853448051 is a prime.

It is not a weakly prime, because it can be changed into another prime (21853448879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10926724089 + 10926724090.

It is an arithmetic number, because the mean of its divisors is an integer number (10926724090).

Almost surely, 2^21853448179 is an apocalyptic number.

21853448179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21853448179 is an equidigital number, since it uses as much as digits as its factorization.

21853448179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1935360, while the sum is 52.

The spelling of 21853448179 in words is "twenty-one billion, eight hundred fifty-three million, four hundred forty-eight thousand, one hundred seventy-nine".