20326769 has 2 divisors, whose sum is σ = 20326770. Its totient is φ = 20326768.

The previous prime is 20326759. The next prime is 20326771. The reversal of 20326769 is 96762302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20133169 + 193600 = 4487^2 + 440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20326769 is a prime.

It is a super-2 number, since 2×20326769² = 826355075958722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 20326771, 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 (20326759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10163384 + 10163385.

It is an arithmetic number, because the mean of its divisors is an integer number (10163385).

Almost surely, 2^20326769 is an apocalyptic number.

It is an amenable number.

20326769 is a deficient number, since it is larger than the sum of its proper divisors (1).

20326769 is an equidigital number, since it uses as much as digits as its factorization.

20326769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 20326769 is about 4508.5218198430. The cubic root of 20326769 is about 272.9120953905.

The spelling of 20326769 in words is "twenty million, three hundred twenty-six thousand, seven hundred sixty-nine".