18035894645 has 4 divisors (see below), whose sum is σ = 21643073580. Its totient is φ = 14428715712.

The previous prime is 18035894627. The next prime is 18035894651. The reversal of 18035894645 is 54649853081.

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 12444294916 + 5591599729 = 111554^2 + 74777^2 .

It is a cyclic number.

It is not a de Polignac number, because 18035894645 - 2²² = 18031700341 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1803589460 + ... + 1803589469.

It is an arithmetic number, because the mean of its divisors is an integer number (5410768395).

Almost surely, 2^18035894645 is an apocalyptic number.

It is an amenable number.

18035894645 is a deficient number, since it is larger than the sum of its proper divisors (3607178935).

18035894645 is an equidigital number, since it uses as much as digits as its factorization.

18035894645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3607178934.

The product of its (nonzero) digits is 4147200, while the sum is 53.

The spelling of 18035894645 in words is "eighteen billion, thirty-five million, eight hundred ninety-four thousand, six hundred forty-five".