21923298179 has 4 divisors (see below), whose sum is σ = 21952107480. Its totient is φ = 21894488880.

The previous prime is 21923298167. The next prime is 21923298203. The reversal of 21923298179 is 97189232912.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21923298179 - 2⁸ = 21923297923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21923298179.

It is not an unprimeable number, because it can be changed into a prime (21923298139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14403509 + ... + 14405030.

It is an arithmetic number, because the mean of its divisors is an integer number (5488026870).

Almost surely, 2^21923298179 is an apocalyptic number.

21923298179 is a deficient number, since it is larger than the sum of its proper divisors (28809301).

21923298179 is an equidigital number, since it uses as much as digits as its factorization.

21923298179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28809300.

The product of its digits is 979776, while the sum is 53.

The spelling of 21923298179 in words is "twenty-one billion, nine hundred twenty-three million, two hundred ninety-eight thousand, one hundred seventy-nine".