21814103 has 4 divisors (see below), whose sum is σ = 21872040. Its totient is φ = 21756168.

The previous prime is 21814087. The next prime is 21814123. The reversal of 21814103 is 30141812.

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

It is a cyclic number.

It is not a de Polignac number, because 21814103 - 2⁴ = 21814087 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21814123) 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, 28400 + ... + 29157.

It is an arithmetic number, because the mean of its divisors is an integer number (5468010).

Almost surely, 2^21814103 is an apocalyptic number.

21814103 is a deficient number, since it is larger than the sum of its proper divisors (57937).

21814103 is an equidigital number, since it uses as much as digits as its factorization.

21814103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57936.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 21814103 is about 4670.5570331600. The cubic root of 21814103 is about 279.4124712721.

Adding to 21814103 its reverse (30141812), we get a palindrome (51955915).

The spelling of 21814103 in words is "twenty-one million, eight hundred fourteen thousand, one hundred three".