21683059 has 2 divisors, whose sum is σ = 21683060. Its totient is φ = 21683058.

The previous prime is 21683033. The next prime is 21683069. The reversal of 21683059 is 95038612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21683059 - 2⁷ = 21682931 is a prime.

It is not a weakly prime, because it can be changed into another prime (21683069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10841529 + 10841530.

It is an arithmetic number, because the mean of its divisors is an integer number (10841530).

Almost surely, 2^21683059 is an apocalyptic number.

21683059 is a deficient number, since it is larger than the sum of its proper divisors (1).

21683059 is an equidigital number, since it uses as much as digits as its factorization.

21683059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 21683059 is about 4656.5071673949. The cubic root of 21683059 is about 278.8518417045.

The spelling of 21683059 in words is "twenty-one million, six hundred eighty-three thousand, fifty-nine".