18136989084 has 24 divisors (see below), whose sum is σ = 43684791808. Its totient is φ = 5850641520.

The previous prime is 18136989083. The next prime is 18136989107. The reversal of 18136989084 is 48098963181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18136989083) 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, 24377302 + ... + 24378045.

Almost surely, 2^18136989084 is an apocalyptic number.

It is an amenable number.

18136989084 is an abundant number, since it is smaller than the sum of its proper divisors (25547802724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18136989084 is a wasteful number, since it uses less digits than its factorization.

18136989084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48755385 (or 48755383 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 57.

The spelling of 18136989084 in words is "eighteen billion, one hundred thirty-six million, nine hundred eighty-nine thousand, eighty-four".