21334250 has 64 divisors (see below), whose sum is σ = 46545408. Its totient is φ = 7171200.

The previous prime is 21334241. The next prime is 21334253. The reversal of 21334250 is 5243312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21334253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127667 + ... + 127833.

It is an arithmetic number, because the mean of its divisors is an integer number (727272).

Almost surely, 2^21334250 is an apocalyptic number.

21334250 is an abundant number, since it is smaller than the sum of its proper divisors (25211158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21334250 is a wasteful number, since it uses less digits than its factorization.

21334250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 254 counting only the distinct ones).

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

The square root of 21334250 is about 4618.9013845286. The cubic root of 21334250 is about 277.3484820657.

Adding to 21334250 its reverse (5243312), we get a palindrome (26577562).

The spelling of 21334250 in words is "twenty-one million, three hundred thirty-four thousand, two hundred fifty".