18746999099 has 2 divisors, whose sum is σ = 18746999100. Its totient is φ = 18746999098.

The previous prime is 18746999057. The next prime is 18746999123. The reversal of 18746999099 is 99099964781.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18746999099 is a prime.

It is not a weakly prime, because it can be changed into another prime (18746993099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9373499549 + 9373499550.

It is an arithmetic number, because the mean of its divisors is an integer number (9373499550).

Almost surely, 2^18746999099 is an apocalyptic number.

18746999099 is a deficient number, since it is larger than the sum of its proper divisors (1).

18746999099 is an equidigital number, since it uses as much as digits as its factorization.

18746999099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79361856, while the sum is 71.

The spelling of 18746999099 in words is "eighteen billion, seven hundred forty-six million, nine hundred ninety-nine thousand, ninety-nine".