20204945171 has 8 divisors (see below), whose sum is σ = 21114579744. Its totient is φ = 19297907200.

The previous prime is 20204945161. The next prime is 20204945207. The reversal of 20204945171 is 17154940202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20204945171 - 2³⁰ = 19131203347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20204945161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633230 + ... + 664371.

It is an arithmetic number, because the mean of its divisors is an integer number (2639322468).

Almost surely, 2^20204945171 is an apocalyptic number.

20204945171 is a deficient number, since it is larger than the sum of its proper divisors (909634573).

20204945171 is a wasteful number, since it uses less digits than its factorization.

20204945171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298301.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 20204945171 in words is "twenty billion, two hundred four million, nine hundred forty-five thousand, one hundred seventy-one".