18669129813 has 24 divisors (see below), whose sum is σ = 27922396320. Its totient is φ = 12005713440.

The previous prime is 18669129803. The next prime is 18669129823. The reversal of 18669129813 is 31892196681.

It is an interprime number because it is at equal distance from previous prime (18669129803) and next prime (18669129823).

It is not a de Polignac number, because 18669129813 - 2⁴ = 18669129797 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18669129813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18669129803) 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 in 23 ways as a sum of consecutive naturals, for example, 251970 + ... + 317532.

It is an arithmetic number, because the mean of its divisors is an integer number (1163433180).

Almost surely, 2^18669129813 is an apocalyptic number.

It is an amenable number.

18669129813 is a deficient number, since it is larger than the sum of its proper divisors (9253266507).

18669129813 is a wasteful number, since it uses less digits than its factorization.

18669129813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66689 (or 66686 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The spelling of 18669129813 in words is "eighteen billion, six hundred sixty-nine million, one hundred twenty-nine thousand, eight hundred thirteen".