19436542199 has 2 divisors, whose sum is σ = 19436542200. Its totient is φ = 19436542198.

The previous prime is 19436542193. The next prime is 19436542267. The reversal of 19436542199 is 99124563491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19436542199 - 2¹² = 19436538103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19436542199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19436542193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9718271099 + 9718271100.

It is an arithmetic number, because the mean of its divisors is an integer number (9718271100).

Almost surely, 2^19436542199 is an apocalyptic number.

19436542199 is a deficient number, since it is larger than the sum of its proper divisors (1).

19436542199 is an equidigital number, since it uses as much as digits as its factorization.

19436542199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 53.

The spelling of 19436542199 in words is "nineteen billion, four hundred thirty-six million, five hundred forty-two thousand, one hundred ninety-nine".