21832823 has 2 divisors, whose sum is σ = 21832824. Its totient is φ = 21832822.

The previous prime is 21832813. The next prime is 21832831. The reversal of 21832823 is 32823812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21832823 - 2¹⁶ = 21767287 is a prime.

It is a Sophie Germain prime.

It is equal to p_1379315 and since 21832823 and 1379315 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21832813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10916411 + 10916412.

It is an arithmetic number, because the mean of its divisors is an integer number (10916412).

Almost surely, 2^21832823 is an apocalyptic number.

21832823 is a deficient number, since it is larger than the sum of its proper divisors (1).

21832823 is an equidigital number, since it uses as much as digits as its factorization.

21832823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 29.

The square root of 21832823 is about 4672.5606470114. The cubic root of 21832823 is about 279.4923753284.

The spelling of 21832823 in words is "twenty-one million, eight hundred thirty-two thousand, eight hundred twenty-three".