18087086428 has 12 divisors (see below), whose sum is σ = 31665984840. Its totient is φ = 9039662192.

The previous prime is 18087086387. The next prime is 18087086441. The reversal of 18087086428 is 82468078081.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 959758 + ... + 978421.

It is an arithmetic number, because the mean of its divisors is an integer number (2638832070).

Almost surely, 2^18087086428 is an apocalyptic number.

It is an amenable number.

18087086428 is a deficient number, since it is larger than the sum of its proper divisors (13578898412).

18087086428 is a wasteful number, since it uses less digits than its factorization.

18087086428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940516 (or 1940514 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 52.

The spelling of 18087086428 in words is "eighteen billion, eighty-seven million, eighty-six thousand, four hundred twenty-eight".