21202311434 has 8 divisors (see below), whose sum is σ = 31888732260. Its totient is φ = 10572734016.

The previous prime is 21202311407. The next prime is 21202311437. The reversal of 21202311434 is 43411320212.

It can be written as a sum of positive squares in 2 ways, for example, as 20829705625 + 372605809 = 144325^2 + 19303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21202311437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14209919 + ... + 14211410.

Almost surely, 2^21202311434 is an apocalyptic number.

21202311434 is a deficient number, since it is larger than the sum of its proper divisors (10686420826).

21202311434 is a wasteful number, since it uses less digits than its factorization.

21202311434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28421704.

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

Adding to 21202311434 its reverse (43411320212), we get a palindrome (64613631646).

The spelling of 21202311434 in words is "twenty-one billion, two hundred two million, three hundred eleven thousand, four hundred thirty-four".