18489102989 has 32 divisors (see below), whose sum is σ = 22511178240. Its totient is φ = 14843347200.

The previous prime is 18489102979. The next prime is 18489103051. The reversal of 18489102989 is 98920198481.

It is a cyclic number.

It is not a de Polignac number, because 18489102989 - 2¹² = 18489098893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18489102949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2244899 + ... + 2253119.

It is an arithmetic number, because the mean of its divisors is an integer number (703474320).

Almost surely, 2^18489102989 is an apocalyptic number.

It is an amenable number.

18489102989 is a deficient number, since it is larger than the sum of its proper divisors (4022075251).

18489102989 is a wasteful number, since it uses less digits than its factorization.

18489102989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8541.

The product of its (nonzero) digits is 2985984, while the sum is 59.

The spelling of 18489102989 in words is "eighteen billion, four hundred eighty-nine million, one hundred two thousand, nine hundred eighty-nine".