18040694568845 has 24 divisors (see below), whose sum is σ = 23445337507200. Its totient is φ = 13320591900096.

The previous prime is 18040694568781. The next prime is 18040694568847. The reversal of 18040694568845 is 54886549604081.

It is not a de Polignac number, because 18040694568845 - 2⁶ = 18040694568781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18040694568847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4975136 + ... + 7799574.

It is an arithmetic number, because the mean of its divisors is an integer number (976889062800).

Almost surely, 2^{18040694568845} is an apocalyptic number.

It is an amenable number.

18040694568845 is a deficient number, since it is larger than the sum of its proper divisors (5404642938355).

18040694568845 is a wasteful number, since it uses less digits than its factorization.

18040694568845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2832029 (or 2832016 counting only the distinct ones).

The product of its (nonzero) digits is 265420800, while the sum is 68.

The spelling of 18040694568845 in words is "eighteen trillion, forty billion, six hundred ninety-four million, five hundred sixty-eight thousand, eight hundred forty-five".