21884099 has 2 divisors, whose sum is σ = 21884100. Its totient is φ = 21884098.

The previous prime is 21884089. The next prime is 21884111. The reversal of 21884099 is 99048812.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21884099 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21884089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10942049 + 10942050.

It is an arithmetic number, because the mean of its divisors is an integer number (10942050).

Almost surely, 2^21884099 is an apocalyptic number.

21884099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21884099 is an equidigital number, since it uses as much as digits as its factorization.

21884099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 21884099 is about 4678.0443563523. The cubic root of 21884099 is about 279.7110071001.

The spelling of 21884099 in words is "twenty-one million, eight hundred eighty-four thousand, ninety-nine".