21344298879 has 16 divisors (see below), whose sum is σ = 29028615264. Its totient is φ = 13946419200.

The previous prime is 21344298863. The next prime is 21344298883. The reversal of 21344298879 is 97889244312.

It is not a de Polignac number, because 21344298879 - 2⁴ = 21344298863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344298809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156114 + ... + 258959.

It is an arithmetic number, because the mean of its divisors is an integer number (1814288454).

Almost surely, 2^21344298879 is an apocalyptic number.

21344298879 is a deficient number, since it is larger than the sum of its proper divisors (7684316385).

21344298879 is a wasteful number, since it uses less digits than its factorization.

21344298879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415418.

The product of its digits is 6967296, while the sum is 57.

The spelling of 21344298879 in words is "twenty-one billion, three hundred forty-four million, two hundred ninety-eight thousand, eight hundred seventy-nine".