18129269739899 has 2 divisors, whose sum is σ = 18129269739900. Its totient is φ = 18129269739898.

The previous prime is 18129269739883. The next prime is 18129269739943. The reversal of 18129269739899 is 99893796292181.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18129269739899 - 2⁴ = 18129269739883 is a prime.

It is a super-2 number, since 2×18129269739899² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18129269739299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9064634869949 + 9064634869950.

It is an arithmetic number, because the mean of its divisors is an integer number (9064634869950).

Almost surely, 2^{18129269739899} is an apocalyptic number.

18129269739899 is a deficient number, since it is larger than the sum of its proper divisors (1).

18129269739899 is an equidigital number, since it uses as much as digits as its factorization.

18129269739899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1904684544, while the sum is 83.

The spelling of 18129269739899 in words is "eighteen trillion, one hundred twenty-nine billion, two hundred sixty-nine million, seven hundred thirty-nine thousand, eight hundred ninety-nine".