21203340334 has 32 divisors (see below), whose sum is σ = 35542488960. Its totient is φ = 9403346400.

The previous prime is 21203340307. The next prime is 21203340337. The reversal of 21203340334 is 43304330212.

It is a junction number, because it is equal to n+sod(n) for n = 21203340299 and 21203340308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203340337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 878277 + ... + 902095.

It is an arithmetic number, because the mean of its divisors is an integer number (1110702780).

Almost surely, 2^21203340334 is an apocalyptic number.

21203340334 is a deficient number, since it is larger than the sum of its proper divisors (14339148626).

21203340334 is a wasteful number, since it uses less digits than its factorization.

21203340334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24816.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 21203340334 its reverse (43304330212), we get a palindrome (64507670546).

The spelling of 21203340334 in words is "twenty-one billion, two hundred three million, three hundred forty thousand, three hundred thirty-four".