21323202203 has 4 divisors (see below), whose sum is σ = 21324985128. Its totient is φ = 21321419280.

The previous prime is 21323202169. The next prime is 21323202211. The reversal of 21323202203 is 30220232312.

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 21323202203 - 2⁶ = 21323202139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21323202283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 873401 + ... + 897482.

It is an arithmetic number, because the mean of its divisors is an integer number (5331246282).

Almost surely, 2^21323202203 is an apocalyptic number.

21323202203 is a deficient number, since it is larger than the sum of its proper divisors (1782925).

21323202203 is a wasteful number, since it uses less digits than its factorization.

21323202203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782924.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21323202203 its reverse (30220232312), we get a palindrome (51543434515).

The spelling of 21323202203 in words is "twenty-one billion, three hundred twenty-three million, two hundred two thousand, two hundred three".