21832529 has 2 divisors, whose sum is σ = 21832530. Its totient is φ = 21832528.

The previous prime is 21832513. The next prime is 21832549. The reversal of 21832529 is 92523812.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20948929 + 883600 = 4577^2 + 940^2 .

It is a cyclic number.

It is not a de Polignac number, because 21832529 - 2⁴ = 21832513 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 21832495 and 21832504.

It is not a weakly prime, because it can be changed into another prime (21832549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10916264 + 10916265.

It is an arithmetic number, because the mean of its divisors is an integer number (10916265).

Almost surely, 2^21832529 is an apocalyptic number.

It is an amenable number.

21832529 is a deficient number, since it is larger than the sum of its proper divisors (1).

21832529 is an equidigital number, since it uses as much as digits as its factorization.

21832529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 21832529 is about 4672.5291866397. The cubic root of 21832529 is about 279.4911207781.

The spelling of 21832529 in words is "twenty-one million, eight hundred thirty-two thousand, five hundred twenty-nine".