21722789297 has 8 divisors (see below), whose sum is σ = 24144713280. Its totient is φ = 19375386160.

The previous prime is 21722789279. The next prime is 21722789317. The reversal of 21722789297 is 79298722712.

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

It is a cyclic number.

It is not a de Polignac number, because 21722789297 - 2²⁰ = 21721740721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21722789497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18629597 + ... + 18630762.

It is an arithmetic number, because the mean of its divisors is an integer number (3018089160).

Almost surely, 2^21722789297 is an apocalyptic number.

It is an amenable number.

21722789297 is a deficient number, since it is larger than the sum of its proper divisors (2421923983).

21722789297 is a wasteful number, since it uses less digits than its factorization.

21722789297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37260423.

The product of its digits is 3556224, while the sum is 56.

The spelling of 21722789297 in words is "twenty-one billion, seven hundred twenty-two million, seven hundred eighty-nine thousand, two hundred ninety-seven".