20823323 has 4 divisors (see below), whose sum is σ = 21108648. Its totient is φ = 20538000.

The previous prime is 20823311. The next prime is 20823331. The reversal of 20823323 is 32332802.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20823323 - 2⁴ = 20823307 is a prime.

It is a super-2 number, since 2×20823323² = 867221561524658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20823343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142553 + ... + 142698.

It is an arithmetic number, because the mean of its divisors is an integer number (5277162).

Almost surely, 2^20823323 is an apocalyptic number.

20823323 is a deficient number, since it is larger than the sum of its proper divisors (285325).

20823323 is an equidigital number, since it uses as much as digits as its factorization.

20823323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285324.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20823323 is about 4563.2579370445. The cubic root of 20823323 is about 275.1165258241.

The spelling of 20823323 in words is "twenty million, eight hundred twenty-three thousand, three hundred twenty-three".