20365769 has 2 divisors, whose sum is σ = 20365770. Its totient is φ = 20365768.

The previous prime is 20365753. The next prime is 20365771. The reversal of 20365769 is 96756302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18835600 + 1530169 = 4340^2 + 1237^2 .

It is a cyclic number.

It is not a de Polignac number, because 20365769 - 2⁴ = 20365753 is a prime.

It is a super-2 number, since 2×20365769² = 829529093922722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 20365771, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20364769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10182884 + 10182885.

It is an arithmetic number, because the mean of its divisors is an integer number (10182885).

Almost surely, 2^20365769 is an apocalyptic number.

It is an amenable number.

20365769 is a deficient number, since it is larger than the sum of its proper divisors (1).

20365769 is an equidigital number, since it uses as much as digits as its factorization.

20365769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 20365769 is about 4512.8448898671. The cubic root of 20365769 is about 273.0865250119.

The spelling of 20365769 in words is "twenty million, three hundred sixty-five thousand, seven hundred sixty-nine".