18005288129 has 16 divisors (see below), whose sum is σ = 18669752640. Its totient is φ = 17352599040.

The previous prime is 18005288113. The next prime is 18005288131. The reversal of 18005288129 is 92188250081.

It is a cyclic number.

It is not a de Polignac number, because 18005288129 - 2⁴ = 18005288113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18005288129.

It is not an unprimeable number, because it can be changed into a prime (18005288179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1416002 + ... + 1428660.

It is an arithmetic number, because the mean of its divisors is an integer number (1166859540).

Almost surely, 2^18005288129 is an apocalyptic number.

It is an amenable number.

18005288129 is a deficient number, since it is larger than the sum of its proper divisors (664464511).

18005288129 is a wasteful number, since it uses less digits than its factorization.

18005288129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13120.

The product of its (nonzero) digits is 92160, while the sum is 44.

The spelling of 18005288129 in words is "eighteen billion, five million, two hundred eighty-eight thousand, one hundred twenty-nine".