21348203 has 2 divisors, whose sum is σ = 21348204. Its totient is φ = 21348202.

The previous prime is 21348161. The next prime is 21348211. The reversal of 21348203 is 30284312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21348203 - 2¹⁴ = 21331819 is a prime.

It is not a weakly prime, because it can be changed into another prime (21348403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10674101 + 10674102.

It is an arithmetic number, because the mean of its divisors is an integer number (10674102).

Almost surely, 2^21348203 is an apocalyptic number.

21348203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21348203 is an equidigital number, since it uses as much as digits as its factorization.

21348203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 21348203 is about 4620.4115617551. The cubic root of 21348203 is about 277.4089325936.

The spelling of 21348203 in words is "twenty-one million, three hundred forty-eight thousand, two hundred three".