21094203 has 8 divisors (see below), whose sum is σ = 30289168. Its totient is φ = 12981024.

The previous prime is 21094163. The next prime is 21094207. The reversal of 21094203 is 30249012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21094203 - 2¹² = 21090107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21094203.

It is not an unprimeable number, because it can be changed into a prime (21094207) 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, 270400 + ... + 270477.

It is an arithmetic number, because the mean of its divisors is an integer number (3786146).

Almost surely, 2^21094203 is an apocalyptic number.

21094203 is a deficient number, since it is larger than the sum of its proper divisors (9194965).

21094203 is a wasteful number, since it uses less digits than its factorization.

21094203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540893.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 21094203 is about 4592.8425838472. The cubic root of 21094203 is about 276.3043402994.

The spelling of 21094203 in words is "twenty-one million, ninety-four thousand, two hundred three".