18669129803 has 2 divisors, whose sum is σ = 18669129804. Its totient is φ = 18669129802.

The previous prime is 18669129799. The next prime is 18669129823. The reversal of 18669129803 is 30892196681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18669129803 - 2² = 18669129799 is a prime.

It is not a weakly prime, because it can be changed into another prime (18669129823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9334564901 + 9334564902.

It is an arithmetic number, because the mean of its divisors is an integer number (9334564902).

Almost surely, 2^18669129803 is an apocalyptic number.

18669129803 is a deficient number, since it is larger than the sum of its proper divisors (1).

18669129803 is an equidigital number, since it uses as much as digits as its factorization.

18669129803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The spelling of 18669129803 in words is "eighteen billion, six hundred sixty-nine million, one hundred twenty-nine thousand, eight hundred three".