21342232 has 8 divisors (see below), whose sum is σ = 40016700. Its totient is φ = 10671112.

The previous prime is 21342227. The next prime is 21342239. The reversal of 21342232 is 23224312.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333882 + ... + 1333897.

Almost surely, 2^21342232 is an apocalyptic number.

It is an amenable number.

21342232 is a deficient number, since it is larger than the sum of its proper divisors (18674468).

21342232 is a wasteful number, since it uses less digits than its factorization.

21342232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2667785 (or 2667781 counting only the distinct ones).

The product of its digits is 576, while the sum is 19.

The square root of 21342232 is about 4619.7653620070. The cubic root of 21342232 is about 277.3830668226.

Adding to 21342232 its reverse (23224312), we get a palindrome (44566544).

The spelling of 21342232 in words is "twenty-one million, three hundred forty-two thousand, two hundred thirty-two".