20826823 has 12 divisors (see below), whose sum is σ = 21982528. Its totient is φ = 19710720.

The previous prime is 20826809. The next prime is 20826859. The reversal of 20826823 is 32862802.

It is not a de Polignac number, because 20826823 - 2⁵ = 20826791 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20826023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107815 + ... + 108007.

Almost surely, 2^20826823 is an apocalyptic number.

20826823 is a deficient number, since it is larger than the sum of its proper divisors (1155705).

20826823 is an equidigital number, since it uses as much as digits as its factorization.

20826823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 20826823 is about 4563.6414188672. The cubic root of 20826823 is about 275.1319388924.

The spelling of 20826823 in words is "twenty million, eight hundred twenty-six thousand, eight hundred twenty-three".