21834003 has 4 divisors (see below), whose sum is σ = 29112008. Its totient is φ = 14556000.

The previous prime is 21833963. The next prime is 21834011. The reversal of 21834003 is 30043812.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21834003 - 2⁶ = 21833939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21834083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3638998 + ... + 3639003.

It is an arithmetic number, because the mean of its divisors is an integer number (7278002).

Almost surely, 2^21834003 is an apocalyptic number.

21834003 is a deficient number, since it is larger than the sum of its proper divisors (7278005).

21834003 is an equidigital number, since it uses as much as digits as its factorization.

21834003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7278004.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 21834003 is about 4672.6869143995. The cubic root of 21834003 is about 279.4974104852.

Adding to 21834003 its reverse (30043812), we get a palindrome (51877815).

The spelling of 21834003 in words is "twenty-one million, eight hundred thirty-four thousand, three".