21342233 has 8 divisors (see below), whose sum is σ = 23824416. Its totient is φ = 18950400.

The previous prime is 21342227. The next prime is 21342239. The reversal of 21342233 is 33224312.

It is an interprime number because it is at equal distance from previous prime (21342227) and next prime (21342239).

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 21342233 - 2⁶ = 21342169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21342239) 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, 22088 + ... + 23033.

It is an arithmetic number, because the mean of its divisors is an integer number (2978052).

Almost surely, 2^21342233 is an apocalyptic number.

It is an amenable number.

21342233 is a deficient number, since it is larger than the sum of its proper divisors (2482183).

21342233 is a wasteful number, since it uses less digits than its factorization.

21342233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45175.

The product of its digits is 864, while the sum is 20.

The square root of 21342233 is about 4619.7654702376. The cubic root of 21342233 is about 277.3830711549.

Adding to 21342233 its reverse (33224312), we get a palindrome (54566545).

The spelling of 21342233 in words is "twenty-one million, three hundred forty-two thousand, two hundred thirty-three".