21973352299 has 4 divisors (see below), whose sum is σ = 22484360536. Its totient is φ = 21462344064.

The previous prime is 21973352279. The next prime is 21973352333. The reversal of 21973352299 is 99225337912.

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 21973352299 - 2¹⁷ = 21973221227 is a prime.

It is a super-2 number, since 2×21973352299² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21973352249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255504054 + ... + 255504139.

It is an arithmetic number, because the mean of its divisors is an integer number (5621090134).

Almost surely, 2^21973352299 is an apocalyptic number.

21973352299 is a deficient number, since it is larger than the sum of its proper divisors (511008237).

21973352299 is an equidigital number, since it uses as much as digits as its factorization.

21973352299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511008236.

The product of its digits is 1837080, while the sum is 52.

The spelling of 21973352299 in words is "twenty-one billion, nine hundred seventy-three million, three hundred fifty-two thousand, two hundred ninety-nine".