20349269 has 2 divisors, whose sum is σ = 20349270. Its totient is φ = 20349268.

The previous prime is 20349253. The next prime is 20349281. The reversal of 20349269 is 96294302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13912900 + 6436369 = 3730^2 + 2537^2 .

It is a cyclic number.

It is not a de Polignac number, because 20349269 - 2⁴ = 20349253 is a prime.

It is a super-2 number, since 2×20349269² = 828185497668722, 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 (20349229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10174634 + 10174635.

It is an arithmetic number, because the mean of its divisors is an integer number (10174635).

Almost surely, 2^20349269 is an apocalyptic number.

It is an amenable number.

20349269 is a deficient number, since it is larger than the sum of its proper divisors (1).

20349269 is an equidigital number, since it uses as much as digits as its factorization.

20349269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 20349269 is about 4511.0164043151. The cubic root of 20349269 is about 273.0127550652.

The spelling of 20349269 in words is "twenty million, three hundred forty-nine thousand, two hundred sixty-nine".