21325376 has 14 divisors (see below), whose sum is σ = 42317670. Its totient is φ = 10662656.

The previous prime is 21325349. The next prime is 21325387. The reversal of 21325376 is 67352312.

It can be written as a sum of positive squares in only one way, i.e., 14440000 + 6885376 = 3800^2 + 2624^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166541 + ... + 166668.

Almost surely, 2^21325376 is an apocalyptic number.

It is an amenable number.

21325376 is a deficient number, since it is larger than the sum of its proper divisors (20992294).

21325376 is an equidigital number, since it uses as much as digits as its factorization.

21325376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333221 (or 333211 counting only the distinct ones).

The product of its digits is 7560, while the sum is 29.

The square root of 21325376 is about 4617.9406665742. The cubic root of 21325376 is about 277.3100222846.

Adding to 21325376 its reverse (67352312), we get a palindrome (88677688).

The spelling of 21325376 in words is "twenty-one million, three hundred twenty-five thousand, three hundred seventy-six".