21348803 has 8 divisors (see below), whose sum is σ = 24465408. Its totient is φ = 18248904.

The previous prime is 21348781. The next prime is 21348809. The reversal of 21348803 is 30884312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21348803 - 2¹⁴ = 21332419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21348809) 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 7 ways as a sum of consecutive naturals, for example, 1301 + ... + 6662.

It is an arithmetic number, because the mean of its divisors is an integer number (3058176).

Almost surely, 2^21348803 is an apocalyptic number.

21348803 is a deficient number, since it is larger than the sum of its proper divisors (3116605).

21348803 is an equidigital number, since it uses as much as digits as its factorization.

21348803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8353.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 21348803 is about 4620.4764905797. The cubic root of 21348803 is about 277.4115314665.

The spelling of 21348803 in words is "twenty-one million, three hundred forty-eight thousand, eight hundred three".