21341203 has 4 divisors (see below), whose sum is σ = 22982848. Its totient is φ = 19699560.

The previous prime is 21341191. The next prime is 21341249. The reversal of 21341203 is 30214312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21341203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820803 + ... + 820828.

It is an arithmetic number, because the mean of its divisors is an integer number (5745712).

Almost surely, 2^21341203 is an apocalyptic number.

21341203 is a deficient number, since it is larger than the sum of its proper divisors (1641645).

21341203 is a wasteful number, since it uses less digits than its factorization.

21341203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641644.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 21341203 is about 4619.6539913721. The cubic root of 21341203 is about 277.3786088108.

Adding to 21341203 its reverse (30214312), we get a palindrome (51555515).

The spelling of 21341203 in words is "twenty-one million, three hundred forty-one thousand, two hundred three".