21348103 has 4 divisors (see below), whose sum is σ = 24397840. Its totient is φ = 18298368.

The previous prime is 21348101. The next prime is 21348127. The reversal of 21348103 is 30184312.

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 21348103 - 2¹ = 21348101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21348101) 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, 1524858 + ... + 1524871.

It is an arithmetic number, because the mean of its divisors is an integer number (6099460).

Almost surely, 2^21348103 is an apocalyptic number.

21348103 is a deficient number, since it is larger than the sum of its proper divisors (3049737).

21348103 is an equidigital number, since it uses as much as digits as its factorization.

21348103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3049736.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 21348103 is about 4620.4007401956. The cubic root of 21348103 is about 277.4084994434.

The spelling of 21348103 in words is "twenty-one million, three hundred forty-eight thousand, one hundred three".