20335397 has 2 divisors, whose sum is σ = 20335398. Its totient is φ = 20335396.

The previous prime is 20335379. The next prime is 20335421. The reversal of 20335397 is 79353302.

Together with previous prime (20335379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20079361 + 256036 = 4481^2 + 506^2 .

It is a cyclic number.

It is not a de Polignac number, because 20335397 - 2⁶ = 20335333 is a prime.

It is a super-2 number, since 2×20335397² = 827056742295218, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20335097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10167698 + 10167699.

It is an arithmetic number, because the mean of its divisors is an integer number (10167699).

Almost surely, 2^20335397 is an apocalyptic number.

It is an amenable number.

20335397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20335397 is an equidigital number, since it uses as much as digits as its factorization.

20335397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010, while the sum is 32.

The square root of 20335397 is about 4509.4785729616. The cubic root of 20335397 is about 272.9507037970.

Adding to 20335397 its reverse (79353302), we get a palindrome (99688699).

The spelling of 20335397 in words is "twenty million, three hundred thirty-five thousand, three hundred ninety-seven".