18103627699 has 2 divisors, whose sum is σ = 18103627700. Its totient is φ = 18103627698.

The previous prime is 18103627657. The next prime is 18103627723. The reversal of 18103627699 is 99672630181.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18103627699 - 2⁹ = 18103627187 is a prime.

It is not a weakly prime, because it can be changed into another prime (18103627099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9051813849 + 9051813850.

It is an arithmetic number, because the mean of its divisors is an integer number (9051813850).

Almost surely, 2^18103627699 is an apocalyptic number.

18103627699 is a deficient number, since it is larger than the sum of its proper divisors (1).

18103627699 is an equidigital number, since it uses as much as digits as its factorization.

18103627699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 18103627699 in words is "eighteen billion, one hundred three million, six hundred twenty-seven thousand, six hundred ninety-nine".