20823269 has 2 divisors, whose sum is σ = 20823270. Its totient is φ = 20823268.

The previous prime is 20823263. The next prime is 20823287. The reversal of 20823269 is 96232802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10647169 + 10176100 = 3263^2 + 3190^2 .

It is a cyclic number.

It is not a de Polignac number, because 20823269 - 2⁸ = 20823013 is a prime.

It is a super-2 number, since 2×20823269² = 867217063692722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20823263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10411634 + 10411635.

It is an arithmetic number, because the mean of its divisors is an integer number (10411635).

Almost surely, 2^20823269 is an apocalyptic number.

It is an amenable number.

20823269 is a deficient number, since it is larger than the sum of its proper divisors (1).

20823269 is an equidigital number, since it uses as much as digits as its factorization.

20823269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20823269 is about 4563.2520202154. The cubic root of 20823269 is about 275.1162880090.

The spelling of 20823269 in words is "twenty million, eight hundred twenty-three thousand, two hundred sixty-nine".