18851799199 has 2 divisors, whose sum is σ = 18851799200. Its totient is φ = 18851799198.

The previous prime is 18851799193. The next prime is 18851799233. The reversal of 18851799199 is 99199715881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18851799199 - 2³ = 18851799191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18851799191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9425899599 + 9425899600.

It is an arithmetic number, because the mean of its divisors is an integer number (9425899600).

Almost surely, 2^18851799199 is an apocalyptic number.

18851799199 is a deficient number, since it is larger than the sum of its proper divisors (1).

18851799199 is an equidigital number, since it uses as much as digits as its factorization.

18851799199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 67.

The spelling of 18851799199 in words is "eighteen billion, eight hundred fifty-one million, seven hundred ninety-nine thousand, one hundred ninety-nine".