20173203045 has 12 divisors (see below), whose sum is σ = 34966885356. Its totient is φ = 10759041600.

The previous prime is 20173203007. The next prime is 20173203047. The reversal of 20173203045 is 54030237102.

20173203045 is a `hidden beast` number, since 20 + 17 + 320 + 304 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15000860484 + 5172342561 = 122478^2 + 71919^2 .

It is not a de Polignac number, because 20173203045 - 2¹¹ = 20173200997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20173203047) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 224146656 + ... + 224146745.

It is an arithmetic number, because the mean of its divisors is an integer number (2913907113).

Almost surely, 2^20173203045 is an apocalyptic number.

It is an amenable number.

20173203045 is a deficient number, since it is larger than the sum of its proper divisors (14793682311).

20173203045 is a wasteful number, since it uses less digits than its factorization.

20173203045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448293412 (or 448293409 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The spelling of 20173203045 in words is "twenty billion, one hundred seventy-three million, two hundred three thousand, forty-five".