20127171204 has 54 divisors (see below), whose sum is σ = 59183472894. Its totient is φ = 5750619840.

The previous prime is 20127171151. The next prime is 20127171209. The reversal of 20127171204 is 40217172102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17436674304 + 2690496900 = 132048^2 + 51870^2 .

It is not an unprimeable number, because it can be changed into a prime (20127171209) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5703217 + ... + 5706744.

Almost surely, 2^20127171204 is an apocalyptic number.

It is an amenable number.

20127171204 is an abundant number, since it is smaller than the sum of its proper divisors (39056301690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20127171204 is a wasteful number, since it uses less digits than its factorization.

20127171204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11409985 (or 11409973 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The spelling of 20127171204 in words is "twenty billion, one hundred twenty-seven million, one hundred seventy-one thousand, two hundred four".