20704597 has 4 divisors (see below), whose sum is σ = 20759040. Its totient is φ = 20650156.

The previous prime is 20704583. The next prime is 20704601. The reversal of 20704597 is 79540702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20704597 - 2⁷ = 20704469 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 (20704507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26647 + ... + 27412.

It is an arithmetic number, because the mean of its divisors is an integer number (5189760).

Almost surely, 2^20704597 is an apocalyptic number.

It is an amenable number.

20704597 is a deficient number, since it is larger than the sum of its proper divisors (54443).

20704597 is an equidigital number, since it uses as much as digits as its factorization.

20704597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54442.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 20704597 is about 4550.2304337253. The cubic root of 20704597 is about 274.5926619506.

The spelling of 20704597 in words is "twenty million, seven hundred four thousand, five hundred ninety-seven".