21874333 has 8 divisors (see below), whose sum is σ = 23631608. Its totient is φ = 20127744.

The previous prime is 21874327. The next prime is 21874367. The reversal of 21874333 is 33347812.

It can be written as a sum of positive squares in 4 ways, for example, as 4 + 21874329 = 2^2 + 4677^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21874333 - 2⁹ = 21873821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21874295 and 21874304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21875333) 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, 1885 + ... + 6877.

It is an arithmetic number, because the mean of its divisors is an integer number (2953951).

Almost surely, 2^21874333 is an apocalyptic number.

It is an amenable number.

21874333 is a deficient number, since it is larger than the sum of its proper divisors (1757275).

21874333 is a wasteful number, since it uses less digits than its factorization.

21874333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5343.

The product of its digits is 12096, while the sum is 31.

The square root of 21874333 is about 4677.0004276245. Note that the first 3 decimals coincide. The cubic root of 21874333 is about 279.6693929561.

The spelling of 21874333 in words is "twenty-one million, eight hundred seventy-four thousand, three hundred thirty-three".