21333041 has 4 divisors (see below), whose sum is σ = 21452400. Its totient is φ = 21213684.

The previous prime is 21333023. The next prime is 21333047. The reversal of 21333041 is 14033312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21333041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21333047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59411 + ... + 59768.

It is an arithmetic number, because the mean of its divisors is an integer number (5363100).

Almost surely, 2^21333041 is an apocalyptic number.

It is an amenable number.

21333041 is a deficient number, since it is larger than the sum of its proper divisors (119359).

21333041 is a wasteful number, since it uses less digits than its factorization.

21333041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119358.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 21333041 is about 4618.7705073970. The cubic root of 21333041 is about 277.3432429056.

Adding to 21333041 its reverse (14033312), we get a palindrome (35366353).

The spelling of 21333041 in words is "twenty-one million, three hundred thirty-three thousand, forty-one".