20597345 has 8 divisors (see below), whose sum is σ = 25385064. Its totient is φ = 16032384.

The previous prime is 20597333. The next prime is 20597383. The reversal of 20597345 is 54379502.

It can be written as a sum of positive squares in 4 ways, for example, as 4661281 + 15936064 = 2159^2 + 3992^2 .

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 20597345 - 2⁶ = 20597281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55484 + ... + 55853.

It is an arithmetic number, because the mean of its divisors is an integer number (3173133).

Almost surely, 2^20597345 is an apocalyptic number.

It is an amenable number.

20597345 is a deficient number, since it is larger than the sum of its proper divisors (4787719).

20597345 is a wasteful number, since it uses less digits than its factorization.

20597345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111379.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 20597345 is about 4538.4297945435. The cubic root of 20597345 is about 274.1177012216.

The spelling of 20597345 in words is "twenty million, five hundred ninety-seven thousand, three hundred forty-five".