18087022145 has 4 divisors (see below), whose sum is σ = 21704426580. Its totient is φ = 14469617712.

The previous prime is 18087022133. The next prime is 18087022181. The reversal of 18087022145 is 54122078081.

It is a Cunningham number, because it is equal to 134488²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6511198864 + 11575823281 = 80692^2 + 107591^2 .

It is a cyclic number.

It is not a de Polignac number, because 18087022145 - 2⁶ = 18087022081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18087022099 and 18087022108.

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, 1808702210 + ... + 1808702219.

It is an arithmetic number, because the mean of its divisors is an integer number (5426106645).

Almost surely, 2^18087022145 is an apocalyptic number.

It is an amenable number.

18087022145 is a deficient number, since it is larger than the sum of its proper divisors (3617404435).

18087022145 is an equidigital number, since it uses as much as digits as its factorization.

18087022145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617404434.

The product of its (nonzero) digits is 35840, while the sum is 38.

The spelling of 18087022145 in words is "eighteen billion, eighty-seven million, twenty-two thousand, one hundred forty-five".