21234350 has 12 divisors (see below), whose sum is σ = 39495984. Its totient is φ = 8493720.

The previous prime is 21234347. The next prime is 21234361. The reversal of 21234350 is 5343212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212294 + ... + 212393.

It is an arithmetic number, because the mean of its divisors is an integer number (3291332).

Almost surely, 2^21234350 is an apocalyptic number.

21234350 is a deficient number, since it is larger than the sum of its proper divisors (18261634).

21234350 is a wasteful number, since it uses less digits than its factorization.

21234350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424699 (or 424694 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 21234350 is about 4608.0744351627. The cubic root of 21234350 is about 276.9148995488.

Adding to 21234350 its reverse (5343212), we get a palindrome (26577562).

The spelling of 21234350 in words is "twenty-one million, two hundred thirty-four thousand, three hundred fifty".