18689281039 has 16 divisors (see below), whose sum is σ = 21982343040. Its totient is φ = 15664952160.

The previous prime is 18689281027. The next prime is 18689281103. The reversal of 18689281039 is 93018298681.

It is not a de Polignac number, because 18689281039 - 2¹⁵ = 18689248271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18689281439) 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, 46764 + ... + 198910.

It is an arithmetic number, because the mean of its divisors is an integer number (1373896440).

Almost surely, 2^18689281039 is an apocalyptic number.

18689281039 is a deficient number, since it is larger than the sum of its proper divisors (3293062001).

18689281039 is a wasteful number, since it uses less digits than its factorization.

18689281039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153030.

The product of its (nonzero) digits is 1492992, while the sum is 55.

The spelling of 18689281039 in words is "eighteen billion, six hundred eighty-nine million, two hundred eighty-one thousand, thirty-nine".