21347103 has 12 divisors (see below), whose sum is σ = 29481608. Its totient is φ = 13739040.

The previous prime is 21347077. The next prime is 21347111. The reversal of 21347103 is 30174312.

It is not a de Polignac number, because 21347103 - 2⁸ = 21346847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21347103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21347603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1708 + ... + 6753.

Almost surely, 2^21347103 is an apocalyptic number.

21347103 is a deficient number, since it is larger than the sum of its proper divisors (8134505).

21347103 is an equidigital number, since it uses as much as digits as its factorization.

21347103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8522 (or 8493 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 21347103 is about 4620.2925232067. The cubic root of 21347103 is about 277.4041678668.

The spelling of 21347103 in words is "twenty-one million, three hundred forty-seven thousand, one hundred three".