20823307 has 2 divisors, whose sum is σ = 20823308. Its totient is φ = 20823306.

The previous prime is 20823287. The next prime is 20823311. The reversal of 20823307 is 70332802.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20823307 is a prime.

It is a super-2 number, since 2×20823307² = 867220228832498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20823337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10411653 + 10411654.

It is an arithmetic number, because the mean of its divisors is an integer number (10411654).

Almost surely, 2^20823307 is an apocalyptic number.

20823307 is a deficient number, since it is larger than the sum of its proper divisors (1).

20823307 is an equidigital number, since it uses as much as digits as its factorization.

20823307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 20823307 is about 4563.2561839108. The cubic root of 20823307 is about 275.1164553604.

The spelling of 20823307 in words is "twenty million, eight hundred twenty-three thousand, three hundred seven".