21213062 has 16 divisors (see below), whose sum is σ = 35194992. Its totient is φ = 9525600.

The previous prime is 21213047. The next prime is 21213089. The reversal of 21213062 is 26031212.

It is a self number, because there is not a number n which added to its sum of digits gives 21213062.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10064 + ... + 11987.

It is an arithmetic number, because the mean of its divisors is an integer number (2199687).

Almost surely, 2^21213062 is an apocalyptic number.

21213062 is a deficient number, since it is larger than the sum of its proper divisors (13981930).

21213062 is a wasteful number, since it uses less digits than its factorization.

21213062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22103.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 21213062 is about 4605.7639974276. The cubic root of 21213062 is about 276.8223304264.

Adding to 21213062 its reverse (26031212), we get a palindrome (47244274).

The spelling of 21213062 in words is "twenty-one million, two hundred thirteen thousand, sixty-two".