21114503 has 4 divisors (see below), whose sum is σ = 21795648. Its totient is φ = 20433360.

The previous prime is 21114463. The next prime is 21114521. The reversal of 21114503 is 30541112.

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 21114503 - 2⁶ = 21114439 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 (21114563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340526 + ... + 340587.

It is an arithmetic number, because the mean of its divisors is an integer number (5448912).

Almost surely, 2^21114503 is an apocalyptic number.

21114503 is a deficient number, since it is larger than the sum of its proper divisors (681145).

21114503 is an equidigital number, since it uses as much as digits as its factorization.

21114503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681144.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 21114503 is about 4595.0520127633. The cubic root of 21114503 is about 276.3929456824.

Adding to 21114503 its reverse (30541112), we get a palindrome (51655615).

The spelling of 21114503 in words is "twenty-one million, one hundred fourteen thousand, five hundred three".