21200059 has 4 divisors (see below), whose sum is σ = 21278560. Its totient is φ = 21121560.

The previous prime is 21200051. The next prime is 21200077. The reversal of 21200059 is 95000212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21200059 - 2³ = 21200051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38844 + ... + 39385.

It is an arithmetic number, because the mean of its divisors is an integer number (5319640).

Almost surely, 2^21200059 is an apocalyptic number.

21200059 is a deficient number, since it is larger than the sum of its proper divisors (78501).

21200059 is an equidigital number, since it uses as much as digits as its factorization.

21200059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78500.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 21200059 is about 4604.3521802747. The cubic root of 21200059 is about 276.7657574765.

The spelling of 21200059 in words is "twenty-one million, two hundred thousand, fifty-nine".