18129915489 has 32 divisors (see below), whose sum is σ = 29368313856. Its totient is φ = 9711648000.

The previous prime is 18129915487. The next prime is 18129915521. The reversal of 18129915489 is 98451992181.

It is not a de Polignac number, because 18129915489 - 2¹ = 18129915487 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18129915487) 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 31 ways as a sum of consecutive naturals, for example, 11557 + ... + 190770.

It is an arithmetic number, because the mean of its divisors is an integer number (917759808).

Almost surely, 2^18129915489 is an apocalyptic number.

It is an amenable number.

18129915489 is a deficient number, since it is larger than the sum of its proper divisors (11238398367).

18129915489 is a wasteful number, since it uses less digits than its factorization.

18129915489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202605.

The product of its digits is 1866240, while the sum is 57.

The spelling of 18129915489 in words is "eighteen billion, one hundred twenty-nine million, nine hundred fifteen thousand, four hundred eighty-nine".