21826964699 has 2 divisors, whose sum is σ = 21826964700. Its totient is φ = 21826964698.

The previous prime is 21826964669. The next prime is 21826964701. The reversal of 21826964699 is 99646962812.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21826964699 is a prime.

Together with 21826964701, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21826964669) 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 as a sum of consecutive naturals, namely, 10913482349 + 10913482350.

It is an arithmetic number, because the mean of its divisors is an integer number (10913482350).

Almost surely, 2^21826964699 is an apocalyptic number.

21826964699 is a deficient number, since it is larger than the sum of its proper divisors (1).

21826964699 is an equidigital number, since it uses as much as digits as its factorization.

21826964699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20155392, while the sum is 62.

The spelling of 21826964699 in words is "twenty-one billion, eight hundred twenty-six million, nine hundred sixty-four thousand, six hundred ninety-nine".