21830003 has 8 divisors (see below), whose sum is σ = 23613408. Its totient is φ = 20061504.

The previous prime is 21829981. The next prime is 21830027. The reversal of 21830003 is 30003812.

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 21830003 - 2¹⁴ = 21813619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21830063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 575 + ... + 6632.

It is an arithmetic number, because the mean of its divisors is an integer number (2951676).

Almost surely, 2^21830003 is an apocalyptic number.

21830003 is a deficient number, since it is larger than the sum of its proper divisors (1783405).

21830003 is a wasteful number, since it uses less digits than its factorization.

21830003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7453.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 21830003 is about 4672.2588755333. The cubic root of 21830003 is about 279.4803414222.

Adding to 21830003 its reverse (30003812), we get a palindrome (51833815).

The spelling of 21830003 in words is "twenty-one million, eight hundred thirty thousand, three".