21602234 has 16 divisors (see below), whose sum is σ = 33523200. Its totient is φ = 10433904.

The previous prime is 21602197. The next prime is 21602237. The reversal of 21602234 is 43220612.

It is not an unprimeable number, because it can be changed into a prime (21602237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5972 + ... + 8880.

It is an arithmetic number, because the mean of its divisors is an integer number (2095200).

Almost surely, 2^21602234 is an apocalyptic number.

21602234 is a deficient number, since it is larger than the sum of its proper divisors (11920966).

21602234 is a wasteful number, since it uses less digits than its factorization.

21602234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3037.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 21602234 is about 4647.8203493681. The cubic root of 21602234 is about 278.5049308982.

Adding to 21602234 its reverse (43220612), we get a palindrome (64822846).

The spelling of 21602234 in words is "twenty-one million, six hundred two thousand, two hundred thirty-four".