21343010242 has 16 divisors (see below), whose sum is σ = 32157240192. Its totient is φ = 10624014000.

The previous prime is 21343010239. The next prime is 21343010243. The reversal of 21343010242 is 24201034312.

It is not an unprimeable number, because it can be changed into a prime (21343010243) 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 7 ways as a sum of consecutive naturals, for example, 503367 + ... + 544117.

It is an arithmetic number, because the mean of its divisors is an integer number (2009827512).

Almost surely, 2^21343010242 is an apocalyptic number.

21343010242 is a deficient number, since it is larger than the sum of its proper divisors (10814229950).

21343010242 is a wasteful number, since it uses less digits than its factorization.

21343010242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41913.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21343010242 its reverse (24201034312), we get a palindrome (45544044554).

The spelling of 21343010242 in words is "twenty-one billion, three hundred forty-three million, ten thousand, two hundred forty-two".