21200002 has 8 divisors (see below), whose sum is σ = 32029200.
Its totient is φ = 10523604.
The previous prime is 21199999. The next prime is 21200021. The reversal of 21200002 is 20000212.
It is a happy number.
It is a sphenic number, since it is the product of 3 distinct primes.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37852 + ... + 38407.
It is an arithmetic number, because the mean of its divisors is an integer number (4003650).
Almost surely, 221200002 is an apocalyptic number.
21200002 is a deficient number, since it is larger than the sum of its proper divisors (10829198).
21200002 is a wasteful number, since it uses less digits than its factorization.
21200002 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 76400.
The product of its (nonzero) digits is 8, while the sum is 7.
The square root of 21200002 is about 4604.3459904747.
The cubic root of 21200002 is about 276.7655094322.
Adding to 21200002 its reverse (20000212), we get a palindrome (41200214).
The spelling of 21200002 in words is "twenty-one million, two hundred thousand, two".