21234352 has 10 divisors (see below), whose sum is σ = 41141588. Its totient is φ = 10617168.

The previous prime is 21234347. The next prime is 21234361. The reversal of 21234352 is 25343212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663558 + ... + 663589.

Almost surely, 2^21234352 is an apocalyptic number.

It is an amenable number.

21234352 is a deficient number, since it is larger than the sum of its proper divisors (19907236).

21234352 is a wasteful number, since it uses less digits than its factorization.

21234352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327155 (or 1327149 counting only the distinct ones).

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

The square root of 21234352 is about 4608.0746521731. The cubic root of 21234352 is about 276.9149082427.

Adding to 21234352 its reverse (25343212), we get a palindrome (46577564).

The spelling of 21234352 in words is "twenty-one million, two hundred thirty-four thousand, three hundred fifty-two".