20804597 has 8 divisors (see below), whose sum is σ = 23179392. Its totient is φ = 18510400.

The previous prime is 20804591. The next prime is 20804611. The reversal of 20804597 is 79540802.

It is a happy number.

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 20804597 - 2⁶ = 20804533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20804591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19604 + ... + 20637.

It is an arithmetic number, because the mean of its divisors is an integer number (2897424).

Almost surely, 2^20804597 is an apocalyptic number.

It is an amenable number.

20804597 is a deficient number, since it is larger than the sum of its proper divisors (2374795).

20804597 is a wasteful number, since it uses less digits than its factorization.

20804597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40299.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 20804597 is about 4561.2056520179. The cubic root of 20804597 is about 275.0340321519.

The spelling of 20804597 in words is "twenty million, eight hundred four thousand, five hundred ninety-seven".