20489875197 has 16 divisors (see below), whose sum is σ = 31099258368. Its totient is φ = 11878188080.

The previous prime is 20489875183. The next prime is 20489875249. The reversal of 20489875197 is 79157898402.

It is not a de Polignac number, because 20489875197 - 2¹¹ = 20489873149 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 20489875197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20489875127) 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, 13497183 + ... + 13498700.

It is an arithmetic number, because the mean of its divisors is an integer number (1943703648).

Almost surely, 2^20489875197 is an apocalyptic number.

It is an amenable number.

20489875197 is a deficient number, since it is larger than the sum of its proper divisors (10609383171).

20489875197 is a wasteful number, since it uses less digits than its factorization.

20489875197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26995920.

The product of its (nonzero) digits is 10160640, while the sum is 60.

The spelling of 20489875197 in words is "twenty billion, four hundred eighty-nine million, eight hundred seventy-five thousand, one hundred ninety-seven".