21936059 has 2 divisors, whose sum is σ = 21936060. Its totient is φ = 21936058.

The previous prime is 21936037. The next prime is 21936067. The reversal of 21936059 is 95063912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21936059 - 2¹² = 21931963 is a prime.

It is not a weakly prime, because it can be changed into another prime (21936559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10968029 + 10968030.

It is an arithmetic number, because the mean of its divisors is an integer number (10968030).

Almost surely, 2^21936059 is an apocalyptic number.

21936059 is a deficient number, since it is larger than the sum of its proper divisors (1).

21936059 is an equidigital number, since it uses as much as digits as its factorization.

21936059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 21936059 is about 4683.5946664928. The cubic root of 21936059 is about 279.9322072270.

The spelling of 21936059 in words is "twenty-one million, nine hundred thirty-six thousand, fifty-nine".