21344323202 has 4 divisors (see below), whose sum is σ = 32016484806. Its totient is φ = 10672161600.

The previous prime is 21344323181. The next prime is 21344323207. The reversal of 21344323202 is 20232344312.

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

It can be written as a sum of positive squares in only one way, i.e., 16167376801 + 5176946401 = 127151^2 + 71951^2 .

It is not an unprimeable number, because it can be changed into a prime (21344323207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5336080799 + ... + 5336080802.

Almost surely, 2^21344323202 is an apocalyptic number.

21344323202 is a deficient number, since it is larger than the sum of its proper divisors (10672161604).

21344323202 is a wasteful number, since it uses less digits than its factorization.

21344323202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10672161603.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21344323202 its reverse (20232344312), we get a palindrome (41576667514).

The spelling of 21344323202 in words is "twenty-one billion, three hundred forty-four million, three hundred twenty-three thousand, two hundred two".