18254282645 has 4 divisors (see below), whose sum is σ = 21905139180. Its totient is φ = 14603426112.

The previous prime is 18254282591. The next prime is 18254282659. The reversal of 18254282645 is 54628245281.

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 11689718161 + 6564564484 = 108119^2 + 81022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18254282645 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18254282645.

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, 1825428260 + ... + 1825428269.

It is an arithmetic number, because the mean of its divisors is an integer number (5476284795).

Almost surely, 2^18254282645 is an apocalyptic number.

It is an amenable number.

18254282645 is a deficient number, since it is larger than the sum of its proper divisors (3650856535).

18254282645 is an equidigital number, since it uses as much as digits as its factorization.

18254282645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650856534.

The product of its digits is 1228800, while the sum is 47.

The spelling of 18254282645 in words is "eighteen billion, two hundred fifty-four million, two hundred eighty-two thousand, six hundred forty-five".