20828823 has 8 divisors (see below), whose sum is σ = 28979328. Its totient is φ = 13282104.

The previous prime is 20828803. The next prime is 20828827. The reversal of 20828823 is 32882802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20828823 - 2¹⁰ = 20827799 is a prime.

It is a super-3 number, since 3×20828823³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20828827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150865 + ... + 151002.

It is an arithmetic number, because the mean of its divisors is an integer number (3622416).

Almost surely, 2^20828823 is an apocalyptic number.

20828823 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20828823 is a deficient number, since it is larger than the sum of its proper divisors (8150505).

20828823 is a wasteful number, since it uses less digits than its factorization.

20828823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301893.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 20828823 is about 4563.8605368701. The cubic root of 20828823 is about 275.1407455847.

The spelling of 20828823 in words is "twenty million, eight hundred twenty-eight thousand, eight hundred twenty-three".