20808573 has 8 divisors (see below), whose sum is σ = 28701600. Its totient is φ = 13393968.

The previous prime is 20808559. The next prime is 20808587. The reversal of 20808573 is 37580802.

It is an interprime number because it is at equal distance from previous prime (20808559) and next prime (20808587).

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

It is not a de Polignac number, because 20808573 - 2⁶ = 20808509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20808373) 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, 119503 + ... + 119676.

It is an arithmetic number, because the mean of its divisors is an integer number (3587700).

Almost surely, 2^20808573 is an apocalyptic number.

It is an amenable number.

20808573 is a deficient number, since it is larger than the sum of its proper divisors (7893027).

20808573 is a wasteful number, since it uses less digits than its factorization.

20808573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239211.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 20808573 is about 4561.6414808707. The cubic root of 20808573 is about 275.0515517680.

The spelling of 20808573 in words is "twenty million, eight hundred eight thousand, five hundred seventy-three".