21325346 has 16 divisors (see below), whose sum is σ = 36706176. Its totient is φ = 9102336.

The previous prime is 21325331. The next prime is 21325349. The reversal of 21325346 is 64352312.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21325349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635 + ... + 6561.

It is an arithmetic number, because the mean of its divisors is an integer number (2294136).

Almost surely, 2^21325346 is an apocalyptic number.

21325346 is a deficient number, since it is larger than the sum of its proper divisors (15380830).

21325346 is a wasteful number, since it uses less digits than its factorization.

21325346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6193.

The product of its digits is 4320, while the sum is 26.

The square root of 21325346 is about 4617.9374183720. The cubic root of 21325346 is about 277.3098922469.

Adding to 21325346 its reverse (64352312), we get a palindrome (85677658).

The spelling of 21325346 in words is "twenty-one million, three hundred twenty-five thousand, three hundred forty-six".