20673171 has 8 divisors (see below), whose sum is σ = 30626960. Its totient is φ = 13782096.

The previous prime is 20673157. The next prime is 20673181. The reversal of 20673171 is 17137602.

It is not a de Polignac number, because 20673171 - 2¹⁷ = 20542099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 765673 = 20673171 / (2 + 0 + 6 + 7 + 3 + 1 + 7 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20673101) 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, 382810 + ... + 382863.

It is an arithmetic number, because the mean of its divisors is an integer number (3828370).

Almost surely, 2^20673171 is an apocalyptic number.

20673171 is a deficient number, since it is larger than the sum of its proper divisors (9953789).

20673171 is an equidigital number, since it uses as much as digits as its factorization.

20673171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765682 (or 765676 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 20673171 is about 4546.7758906724. The cubic root of 20673171 is about 274.4536635335.

The spelling of 20673171 in words is "twenty million, six hundred seventy-three thousand, one hundred seventy-one".