21996692258 has 54 divisors (see below), whose sum is σ = 36400123953. Its totient is φ = 9967129920.

The previous prime is 21996692239. The next prime is 21996692273. The reversal of 21996692258 is 85229669912.

It can be written as a sum of positive squares in 2 ways, for example, as 20131920769 + 1864771489 = 141887^2 + 43183^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=104873.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21996692197 and 21996692206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 110536043 + ... + 110536241.

Almost surely, 2^21996692258 is an apocalyptic number.

21996692258 is a deficient number, since it is larger than the sum of its proper divisors (14403431695).

21996692258 is an equidigital number, since it uses as much as digits as its factorization.

21996692258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 249 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 59.

The spelling of 21996692258 in words is "twenty-one billion, nine hundred ninety-six million, six hundred ninety-two thousand, two hundred fifty-eight".