17945983213045 has 16 divisors (see below), whose sum is σ = 22038196118400. Its totient is φ = 14021509005504.

The previous prime is 17945983213043. The next prime is 17945983213061. The reversal of 17945983213045 is 54031238954971.

It is a cyclic number.

It is not a de Polignac number, because 17945983213045 - 2¹ = 17945983213043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17945983213043) 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, 2000145 + ... + 6316054.

It is an arithmetic number, because the mean of its divisors is an integer number (1377387257400).

Almost surely, 2^{17945983213045} is an apocalyptic number.

It is an amenable number.

17945983213045 is a deficient number, since it is larger than the sum of its proper divisors (4092212905355).

17945983213045 is a wasteful number, since it uses less digits than its factorization.

17945983213045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8326284.

The product of its (nonzero) digits is 32659200, while the sum is 61.

The spelling of 17945983213045 in words is "seventeen trillion, nine hundred forty-five billion, nine hundred eighty-three million, two hundred thirteen thousand, forty-five".