20327597 has 4 divisors (see below), whose sum is σ = 21523356. Its totient is φ = 19131840.

The previous prime is 20327509. The next prime is 20327603. The reversal of 20327597 is 79572302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14032516 + 6295081 = 3746^2 + 2509^2 .

It is a cyclic number.

It is not a de Polignac number, because 20327597 - 2²⁰ = 19279021 is a prime.

It is a super-2 number, since 2×20327597² = 826422399588818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20327297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597854 + ... + 597887.

It is an arithmetic number, because the mean of its divisors is an integer number (5380839).

Almost surely, 2^20327597 is an apocalyptic number.

It is an amenable number.

20327597 is a deficient number, since it is larger than the sum of its proper divisors (1195759).

20327597 is a wasteful number, since it uses less digits than its factorization.

20327597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195758.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 20327597 is about 4508.6136450133. The cubic root of 20327597 is about 272.9158009827.

Adding to 20327597 its reverse (79572302), we get a palindrome (99899899).

The spelling of 20327597 in words is "twenty million, three hundred twenty-seven thousand, five hundred ninety-seven".