20371816171 has 8 divisors (see below), whose sum is σ = 23283431424. Its totient is φ = 17460539880.

The previous prime is 20371816123. The next prime is 20371816211. The reversal of 20371816171 is 17161817302.

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

It is not a de Polignac number, because 20371816171 - 2²³ = 20363427563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20371816171.

It is not an unprimeable number, because it can be changed into a prime (20371816111) 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, 60696 + ... + 210778.

It is an arithmetic number, because the mean of its divisors is an integer number (2910428928).

Almost surely, 2^20371816171 is an apocalyptic number.

20371816171 is a deficient number, since it is larger than the sum of its proper divisors (2911615253).

20371816171 is a wasteful number, since it uses less digits than its factorization.

20371816171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169481.

The product of its (nonzero) digits is 14112, while the sum is 37.

The spelling of 20371816171 in words is "twenty billion, three hundred seventy-one million, eight hundred sixteen thousand, one hundred seventy-one".