18500941099 has 2 divisors, whose sum is σ = 18500941100. Its totient is φ = 18500941098.

The previous prime is 18500941097. The next prime is 18500941103. The reversal of 18500941099 is 99014900581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18500941099 - 2¹ = 18500941097 is a prime.

Together with 18500941097, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18500941097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9250470549 + 9250470550.

It is an arithmetic number, because the mean of its divisors is an integer number (9250470550).

Almost surely, 2^18500941099 is an apocalyptic number.

18500941099 is a deficient number, since it is larger than the sum of its proper divisors (1).

18500941099 is an equidigital number, since it uses as much as digits as its factorization.

18500941099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 46.

The spelling of 18500941099 in words is "eighteen billion, five hundred million, nine hundred forty-one thousand, ninety-nine".