20697173 has 8 divisors (see below), whose sum is σ = 23691840. Its totient is φ = 17712000.

The previous prime is 20697167. The next prime is 20697199. The reversal of 20697173 is 37179602.

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 20697173 - 2²⁰ = 19648597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20697113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3173 + ... + 7173.

It is an arithmetic number, because the mean of its divisors is an integer number (2961480).

Almost surely, 2^20697173 is an apocalyptic number.

It is an amenable number.

20697173 is a deficient number, since it is larger than the sum of its proper divisors (2994667).

20697173 is an equidigital number, since it uses as much as digits as its factorization.

20697173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4747.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 20697173 is about 4549.4145777232. The cubic root of 20697173 is about 274.5598380062.

It can be divided in two parts, 206 and 97173, that added together give a palindrome (97379).

The spelling of 20697173 in words is "twenty million, six hundred ninety-seven thousand, one hundred seventy-three".