20752297 has 2 divisors, whose sum is σ = 20752298. Its totient is φ = 20752296.

The previous prime is 20752289. The next prime is 20752307. The reversal of 20752297 is 79225702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16736281 + 4016016 = 4091^2 + 2004^2 .

It is a cyclic number.

It is not a de Polignac number, because 20752297 - 2³ = 20752289 is a prime.

It is not a weakly prime, because it can be changed into another prime (20752217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10376148 + 10376149.

It is an arithmetic number, because the mean of its divisors is an integer number (10376149).

Almost surely, 2^20752297 is an apocalyptic number.

It is an amenable number.

20752297 is a deficient number, since it is larger than the sum of its proper divisors (1).

20752297 is an equidigital number, since it uses as much as digits as its factorization.

20752297 is an evil number, because the sum of its binary digits is even.

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

The square root of 20752297 is about 4555.4689111002. The cubic root of 20752297 is about 274.8033723906.

Adding to 20752297 its reverse (79225702), we get a palindrome (99977999).

The spelling of 20752297 in words is "twenty million, seven hundred fifty-two thousand, two hundred ninety-seven".