21722979326 has 8 divisors (see below), whose sum is σ = 34001185104. Its totient is φ = 10389250960.

The previous prime is 21722979323. The next prime is 21722979329. The reversal of 21722979326 is 62397922712.

It is an interprime number because it is at equal distance from previous prime (21722979323) and next prime (21722979329).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21722979323) 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, 236119295 + ... + 236119386.

It is an arithmetic number, because the mean of its divisors is an integer number (4250148138).

Almost surely, 2^21722979326 is an apocalyptic number.

21722979326 is a deficient number, since it is larger than the sum of its proper divisors (12278205778).

21722979326 is a wasteful number, since it uses less digits than its factorization.

21722979326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472238706.

The product of its digits is 1143072, while the sum is 50.

The spelling of 21722979326 in words is "twenty-one billion, seven hundred twenty-two million, nine hundred seventy-nine thousand, three hundred twenty-six".