21344103 has 24 divisors (see below), whose sum is σ = 33860736. Its totient is φ = 12848400.

The previous prime is 21344093. The next prime is 21344117. The reversal of 21344103 is 30144312.

It is not a de Polignac number, because 21344103 - 2¹³ = 21335911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15888 + ... + 17178.

It is an arithmetic number, because the mean of its divisors is an integer number (1410864).

Almost surely, 2^21344103 is an apocalyptic number.

21344103 is a deficient number, since it is larger than the sum of its proper divisors (12516633).

21344103 is a wasteful number, since it uses less digits than its factorization.

21344103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475 (or 1472 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 21344103 is about 4619.9678570310. The cubic root of 21344103 is about 277.3911723252.

Adding to 21344103 its reverse (30144312), we get a palindrome (51488415).

It can be divided in two parts, 213 and 44103, that multiplied together give a palindrome (9393939).

The spelling of 21344103 in words is "twenty-one million, three hundred forty-four thousand, one hundred three".