21382333 has 8 divisors (see below), whose sum is σ = 24468480. Its totient is φ = 18304080.

The previous prime is 21382331. The next prime is 21382349. The reversal of 21382333 is 33328312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21382333 - 2¹ = 21382331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21382298 and 21382307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21382331) 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, 5988 + ... + 8866.

It is an arithmetic number, because the mean of its divisors is an integer number (3058560).

Almost surely, 2^21382333 is an apocalyptic number.

It is an amenable number.

21382333 is a deficient number, since it is larger than the sum of its proper divisors (3086147).

21382333 is a wasteful number, since it uses less digits than its factorization.

21382333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947.

The product of its digits is 2592, while the sum is 25.

The square root of 21382333 is about 4624.1034806760. The cubic root of 21382333 is about 277.5566878211.

The spelling of 21382333 in words is "twenty-one million, three hundred eighty-two thousand, three hundred thirty-three".