18199429129 has 24 divisors (see below), whose sum is σ = 23003923200. Its totient is φ = 14301735840.

The previous prime is 18199429123. The next prime is 18199429139. The reversal of 18199429129 is 92192499181.

It is not a de Polignac number, because 18199429129 - 2⁵ = 18199429097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18199429129.

It is not an unprimeable number, because it can be changed into a prime (18199429123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 286434 + ... + 344155.

It is an arithmetic number, because the mean of its divisors is an integer number (958496800).

Almost surely, 2^18199429129 is an apocalyptic number.

18199429129 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18199429129 is a deficient number, since it is larger than the sum of its proper divisors (4804494071).

18199429129 is a wasteful number, since it uses less digits than its factorization.

18199429129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630653 (or 630646 counting only the distinct ones).

The product of its digits is 839808, while the sum is 55.

The spelling of 18199429129 in words is "eighteen billion, one hundred ninety-nine million, four hundred twenty-nine thousand, one hundred twenty-nine".