20672162171 has 8 divisors (see below), whose sum is σ = 21352639488. Its totient is φ = 19992537000.

The previous prime is 20672162167. The next prime is 20672162177. The reversal of 20672162171 is 17126127602.

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 20672162171 - 2² = 20672162167 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20672162177) 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, 163535 + ... + 260936.

It is an arithmetic number, because the mean of its divisors is an integer number (2669079936).

Almost surely, 2^20672162171 is an apocalyptic number.

20672162171 is a deficient number, since it is larger than the sum of its proper divisors (680477317).

20672162171 is a wasteful number, since it uses less digits than its factorization.

20672162171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426073.

The product of its (nonzero) digits is 14112, while the sum is 35.

Adding to 20672162171 its reverse (17126127602), we get a palindrome (37798289773).

The spelling of 20672162171 in words is "twenty billion, six hundred seventy-two million, one hundred sixty-two thousand, one hundred seventy-one".