21194203 has 2 divisors, whose sum is σ = 21194204. Its totient is φ = 21194202.

The previous prime is 21194197. The next prime is 21194213. The reversal of 21194203 is 30249112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21194203 - 2⁹ = 21193691 is a prime.

It is not a weakly prime, because it can be changed into another prime (21194213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10597101 + 10597102.

It is an arithmetic number, because the mean of its divisors is an integer number (10597102).

Almost surely, 2^21194203 is an apocalyptic number.

21194203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21194203 is an equidigital number, since it uses as much as digits as its factorization.

21194203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 21194203 is about 4603.7162162757. The cubic root of 21194203 is about 276.7402718630.

The spelling of 21194203 in words is "twenty-one million, one hundred ninety-four thousand, two hundred three".