21452333 has 12 divisors (see below), whose sum is σ = 25011168. Its totient is φ = 18024240.

The previous prime is 21452309. The next prime is 21452339. The reversal of 21452333 is 33325412.

It is not a de Polignac number, because 21452333 - 2⁶ = 21452269 is a prime.

It is a super-2 number, since 2×21452333² = 920405182285778, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21452299 and 21452308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21452339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19118 + ... + 20208.

It is an arithmetic number, because the mean of its divisors is an integer number (2084264).

Almost surely, 2^21452333 is an apocalyptic number.

It is an amenable number.

21452333 is a deficient number, since it is larger than the sum of its proper divisors (3558835).

21452333 is an equidigital number, since it uses as much as digits as its factorization.

21452333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 1151 counting only the distinct ones).

The product of its digits is 2160, while the sum is 23.

The square root of 21452333 is about 4631.6663308144. Note that the first 3 decimals coincide. The cubic root of 21452333 is about 277.8592398530.

Adding to 21452333 its reverse (33325412), we get a palindrome (54777745).

The spelling of 21452333 in words is "twenty-one million, four hundred fifty-two thousand, three hundred thirty-three".