20432297 has 2 divisors, whose sum is σ = 20432298. Its totient is φ = 20432296.

The previous prime is 20432287. The next prime is 20432329. The reversal of 20432297 is 79223402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20106256 + 326041 = 4484^2 + 571^2 .

It is a cyclic number.

It is not a de Polignac number, because 20432297 - 2⁶ = 20432233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20432287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216148 + 10216149.

It is an arithmetic number, because the mean of its divisors is an integer number (10216149).

Almost surely, 2^20432297 is an apocalyptic number.

It is an amenable number.

20432297 is a deficient number, since it is larger than the sum of its proper divisors (1).

20432297 is an equidigital number, since it uses as much as digits as its factorization.

20432297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20432297 is about 4520.2098402618. The cubic root of 20432297 is about 273.3835618910.

Adding to 20432297 its reverse (79223402), we get a palindrome (99655699).

The spelling of 20432297 in words is "twenty million, four hundred thirty-two thousand, two hundred ninety-seven".