21041264342 has 20 divisors (see below), whose sum is σ = 36820030116. Its totient is φ = 9017682660.

The previous prime is 21041264339. The next prime is 21041264351. The reversal of 21041264342 is 24346214012.

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 2186084 + ... + 2195687.

Almost surely, 2^21041264342 is an apocalyptic number.

21041264342 is a deficient number, since it is larger than the sum of its proper divisors (15778765774).

21041264342 is an frugal number, since it uses more digits than its factorization.

21041264342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4381801 (or 4381780 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21041264342 its reverse (24346214012), we get a palindrome (45387478354).

The spelling of 21041264342 in words is "twenty-one billion, forty-one million, two hundred sixty-four thousand, three hundred forty-two".