20395597 has 6 divisors (see below), whose sum is σ = 21666218. Its totient is φ = 19195584.

The previous prime is 20395579. The next prime is 20395633. The reversal of 20395597 is 79559302.

It can be written as a sum of positive squares in 3 ways, for example, as 5294601 + 15100996 = 2301^2 + 3886^2 .

It is not a de Polignac number, because 20395597 - 2⁷ = 20395469 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 (20395517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34998 + ... + 35575.

Almost surely, 2^20395597 is an apocalyptic number.

It is an amenable number.

20395597 is a deficient number, since it is larger than the sum of its proper divisors (1270621).

20395597 is an equidigital number, since it uses as much as digits as its factorization.

20395597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70607 (or 70590 counting only the distinct ones).

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 20395597 is about 4516.1484696586. The cubic root of 20395597 is about 273.2197821352.

The spelling of 20395597 in words is "twenty million, three hundred ninety-five thousand, five hundred ninety-seven".