21004883 has 2 divisors, whose sum is σ = 21004884. Its totient is φ = 21004882.

The previous prime is 21004847. The next prime is 21004891. The reversal of 21004883 is 38840012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21004883 - 2²² = 16810579 is a prime.

It is not a weakly prime, because it can be changed into another prime (21004813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10502441 + 10502442.

It is an arithmetic number, because the mean of its divisors is an integer number (10502442).

Almost surely, 2^21004883 is an apocalyptic number.

21004883 is a deficient number, since it is larger than the sum of its proper divisors (1).

21004883 is an equidigital number, since it uses as much as digits as its factorization.

21004883 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 21004883 is about 4583.1084429675. The cubic root of 21004883 is about 275.9137998329.

Adding to 21004883 its reverse (38840012), we get a palindrome (59844895).

The spelling of 21004883 in words is "twenty-one million, four thousand, eight hundred eighty-three".