21342352 has 20 divisors (see below), whose sum is σ = 41564800. Its totient is φ = 10615968.

The previous prime is 21342341. The next prime is 21342359. The reversal of 21342352 is 25324312.

It is not an unprimeable number, because it can be changed into a prime (21342359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168 + ... + 6535.

It is an arithmetic number, because the mean of its divisors is an integer number (2078240).

Almost surely, 2^21342352 is an apocalyptic number.

It is an amenable number.

21342352 is a deficient number, since it is larger than the sum of its proper divisors (20222448).

21342352 is a wasteful number, since it uses less digits than its factorization.

21342352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6910 (or 6904 counting only the distinct ones).

The product of its digits is 1440, while the sum is 22.

The square root of 21342352 is about 4619.7783496614. The cubic root of 21342352 is about 277.3835866980.

Adding to 21342352 its reverse (25324312), we get a palindrome (46666664).

The spelling of 21342352 in words is "twenty-one million, three hundred forty-two thousand, three hundred fifty-two".