21496333 has 4 divisors (see below), whose sum is σ = 21506940. Its totient is φ = 21485728.

The previous prime is 21496331. The next prime is 21496373. The reversal of 21496333 is 33369412.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12981609 + 8514724 = 3603^2 + 2918^2 .

It is a cyclic number.

It is not a de Polignac number, because 21496333 - 2¹ = 21496331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21496295 and 21496304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21496331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1210 + ... + 6667.

It is an arithmetic number, because the mean of its divisors is an integer number (5376735).

Almost surely, 2^21496333 is an apocalyptic number.

It is an amenable number.

21496333 is a deficient number, since it is larger than the sum of its proper divisors (10607).

21496333 is an equidigital number, since it uses as much as digits as its factorization.

21496333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10606.

The product of its digits is 11664, while the sum is 31.

The square root of 21496333 is about 4636.4138081064. The cubic root of 21496333 is about 278.0490786839.

The spelling of 21496333 in words is "twenty-one million, four hundred ninety-six thousand, three hundred thirty-three".