21343204234 has 32 divisors (see below), whose sum is σ = 37585933632. Its totient is φ = 8981088000.

The previous prime is 21343204193. The next prime is 21343204247. The reversal of 21343204234 is 43240234312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444952 + ... + 490579.

It is an arithmetic number, because the mean of its divisors is an integer number (1174560426).

Almost surely, 2^21343204234 is an apocalyptic number.

21343204234 is a deficient number, since it is larger than the sum of its proper divisors (16242729398).

21343204234 is a wasteful number, since it uses less digits than its factorization.

21343204234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935622.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21343204234 its reverse (43240234312), we get a palindrome (64583438546).

The spelling of 21343204234 in words is "twenty-one billion, three hundred forty-three million, two hundred four thousand, two hundred thirty-four".