21992563199 has 2 divisors, whose sum is σ = 21992563200. Its totient is φ = 21992563198.

The previous prime is 21992563183. The next prime is 21992563267. The reversal of 21992563199 is 99136529912.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21992563199 - 2⁴ = 21992563183 is a prime.

It is a super-2 number, since 2×21992563199² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21992563169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10996281599 + 10996281600.

It is an arithmetic number, because the mean of its divisors is an integer number (10996281600).

Almost surely, 2^21992563199 is an apocalyptic number.

21992563199 is a deficient number, since it is larger than the sum of its proper divisors (1).

21992563199 is an equidigital number, since it uses as much as digits as its factorization.

21992563199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2361960, while the sum is 56.

The spelling of 21992563199 in words is "twenty-one billion, nine hundred ninety-two million, five hundred sixty-three thousand, one hundred ninety-nine".