18087728743 has 16 divisors (see below), whose sum is σ = 20913657856. Its totient is φ = 15323346720.

The previous prime is 18087728719. The next prime is 18087728749. The reversal of 18087728743 is 34782778081.

It is a cyclic number.

It is not a de Polignac number, because 18087728743 - 2¹³ = 18087720551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18087728749) 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, 162730 + ... + 250312.

It is an arithmetic number, because the mean of its divisors is an integer number (1307103616).

Almost surely, 2^18087728743 is an apocalyptic number.

18087728743 is a deficient number, since it is larger than the sum of its proper divisors (2825929113).

18087728743 is a wasteful number, since it uses less digits than its factorization.

18087728743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87934.

The product of its (nonzero) digits is 4214784, while the sum is 55.

The spelling of 18087728743 in words is "eighteen billion, eighty-seven million, seven hundred twenty-eight thousand, seven hundred forty-three".