18385517092 has 24 divisors (see below), whose sum is σ = 33307061760. Its totient is φ = 8869650720.

The previous prime is 18385516997. The next prime is 18385517093. The reversal of 18385517092 is 29071558381.

It is not an unprimeable number, because it can be changed into a prime (18385517093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116763 + ... + 224509.

It is an arithmetic number, because the mean of its divisors is an integer number (1387794240).

Almost surely, 2^18385517092 is an apocalyptic number.

It is an amenable number.

18385517092 is a deficient number, since it is larger than the sum of its proper divisors (14921544668).

18385517092 is a wasteful number, since it uses less digits than its factorization.

18385517092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109251 (or 109249 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 49.

The spelling of 18385517092 in words is "eighteen billion, three hundred eighty-five million, five hundred seventeen thousand, ninety-two".