21234106 has 16 divisors (see below), whose sum is σ = 33341184. Its totient is φ = 10123344.

The previous prime is 21234097. The next prime is 21234113. The reversal of 21234106 is 60143212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20800 + ... + 21796.

It is an arithmetic number, because the mean of its divisors is an integer number (2083824).

Almost surely, 2^21234106 is an apocalyptic number.

21234106 is a deficient number, since it is larger than the sum of its proper divisors (12107078).

21234106 is a wasteful number, since it uses less digits than its factorization.

21234106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 21234106 is about 4608.0479598199. The cubic root of 21234106 is about 276.9138388854.

Adding to 21234106 its reverse (60143212), we get a palindrome (81377318).

The spelling of 21234106 in words is "twenty-one million, two hundred thirty-four thousand, one hundred six".