21334003 has 4 divisors (see below), whose sum is σ = 21343840. Its totient is φ = 21324168.

The previous prime is 21333973. The next prime is 21334007. The reversal of 21334003 is 30043312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21334003 - 2⁵ = 21333971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21334007) 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, 75 + ... + 6532.

It is an arithmetic number, because the mean of its divisors is an integer number (5335960).

Almost surely, 2^21334003 is an apocalyptic number.

21334003 is a deficient number, since it is larger than the sum of its proper divisors (9837).

21334003 is an equidigital number, since it uses as much as digits as its factorization.

21334003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9836.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 21334003 is about 4618.8746464913. The cubic root of 21334003 is about 277.3474117157.

Adding to 21334003 its reverse (30043312), we get a palindrome (51377315).

The spelling of 21334003 in words is "twenty-one million, three hundred thirty-four thousand, three".