21000883 has 2 divisors, whose sum is σ = 21000884. Its totient is φ = 21000882.

The previous prime is 21000853. The next prime is 21000893. The reversal of 21000883 is 38800012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21000883 - 2⁵ = 21000851 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000803) 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, 10500441 + 10500442.

It is an arithmetic number, because the mean of its divisors is an integer number (10500442).

Almost surely, 2^21000883 is an apocalyptic number.

21000883 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000883 is an equidigital number, since it uses as much as digits as its factorization.

21000883 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 21000883 is about 4582.6720371416. The cubic root of 21000883 is about 275.8962844570.

Adding to 21000883 its reverse (38800012), we get a palindrome (59800895).

The spelling of 21000883 in words is "twenty-one million, eight hundred eighty-three", and thus it is an aban number.