19902190199 has 2 divisors, whose sum is σ = 19902190200. Its totient is φ = 19902190198.

The previous prime is 19902190183. The next prime is 19902190211. The reversal of 19902190199 is 99109120991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19902190199 - 2⁴ = 19902190183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19902190799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9951095099 + 9951095100.

It is an arithmetic number, because the mean of its divisors is an integer number (9951095100).

Almost surely, 2^19902190199 is an apocalyptic number.

19902190199 is a deficient number, since it is larger than the sum of its proper divisors (1).

19902190199 is an equidigital number, since it uses as much as digits as its factorization.

19902190199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118098, while the sum is 50.

The spelling of 19902190199 in words is "nineteen billion, nine hundred two million, one hundred ninety thousand, one hundred ninety-nine".