21304054342 has 16 divisors (see below), whose sum is σ = 33879988800. Its totient is φ = 10018791720.

The previous prime is 21304054307. The next prime is 21304054351. The reversal of 21304054342 is 24345040312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21304054342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2011384 + ... + 2021947.

It is an arithmetic number, because the mean of its divisors is an integer number (2117499300).

Almost surely, 2^21304054342 is an apocalyptic number.

21304054342 is a deficient number, since it is larger than the sum of its proper divisors (12575934458).

21304054342 is a wasteful number, since it uses less digits than its factorization.

21304054342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033491.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 21304054342 its reverse (24345040312), we get a palindrome (45649094654).

The spelling of 21304054342 in words is "twenty-one billion, three hundred four million, fifty-four thousand, three hundred forty-two".