21042883 has 2 divisors, whose sum is σ = 21042884. Its totient is φ = 21042882.

The previous prime is 21042877. The next prime is 21042911. The reversal of 21042883 is 38824012.

It is an a-pointer prime, because the next prime (21042911) can be obtained adding 21042883 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21042883 - 2⁵ = 21042851 is a prime.

It is not a weakly prime, because it can be changed into another prime (21042803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10521441 + 10521442.

It is an arithmetic number, because the mean of its divisors is an integer number (10521442).

Almost surely, 2^21042883 is an apocalyptic number.

21042883 is a deficient number, since it is larger than the sum of its proper divisors (1).

21042883 is an equidigital number, since it uses as much as digits as its factorization.

21042883 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 21042883 is about 4587.2522276413. The cubic root of 21042883 is about 276.0800851056.

Adding to 21042883 its reverse (38824012), we get a palindrome (59866895).

The spelling of 21042883 in words is "twenty-one million, forty-two thousand, eight hundred eighty-three".