21692731199 has 2 divisors, whose sum is σ = 21692731200. Its totient is φ = 21692731198.

The previous prime is 21692731183. The next prime is 21692731201. The reversal of 21692731199 is 99113729612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21692731199 - 2⁴ = 21692731183 is a prime.

It is a Sophie Germain prime.

Together with 21692731201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21692731139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10846365599 + 10846365600.

It is an arithmetic number, because the mean of its divisors is an integer number (10846365600).

Almost surely, 2^21692731199 is an apocalyptic number.

21692731199 is a deficient number, since it is larger than the sum of its proper divisors (1).

21692731199 is an equidigital number, since it uses as much as digits as its factorization.

21692731199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 50.

The spelling of 21692731199 in words is "twenty-one billion, six hundred ninety-two million, seven hundred thirty-one thousand, one hundred ninety-nine".