21674333 has 2 divisors, whose sum is σ = 21674334. Its totient is φ = 21674332.

The previous prime is 21674327. The next prime is 21674347. The reversal of 21674333 is 33347612.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18207289 + 3467044 = 4267^2 + 1862^2 .

It is a cyclic number.

It is not a de Polignac number, because 21674333 - 2¹⁸ = 21412189 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21674296 and 21674305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21674033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10837166 + 10837167.

It is an arithmetic number, because the mean of its divisors is an integer number (10837167).

Almost surely, 2^21674333 is an apocalyptic number.

It is an amenable number.

21674333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21674333 is an equidigital number, since it uses as much as digits as its factorization.

21674333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 29.

The square root of 21674333 is about 4655.5701047240. The cubic root of 21674333 is about 278.8144301989.

It can be divided in two parts, 2167 and 4333, that multiplied together give a triangular number (9389611 = T₄₃₃₃).

The spelling of 21674333 in words is "twenty-one million, six hundred seventy-four thousand, three hundred thirty-three".