21200558 has 8 divisors (see below), whose sum is σ = 32030040. Its totient is φ = 10523880.

The previous prime is 21200539. The next prime is 21200563. The reversal of 21200558 is 85500212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×21200558³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37853 + ... + 38408.

It is an arithmetic number, because the mean of its divisors is an integer number (4003755).

Almost surely, 2^21200558 is an apocalyptic number.

21200558 is a deficient number, since it is larger than the sum of its proper divisors (10829482).

21200558 is a wasteful number, since it uses less digits than its factorization.

21200558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76402.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 21200558 is about 4604.4063678177. The cubic root of 21200558 is about 276.7679289332.

The spelling of 21200558 in words is "twenty-one million, two hundred thousand, five hundred fifty-eight".