21432004342 has 16 divisors (see below), whose sum is σ = 37083951360. Its totient is φ = 9099301608.

The previous prime is 21432004339. The next prime is 21432004361. The reversal of 21432004342 is 24340023412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7152042 + ... + 7155037.

It is an arithmetic number, because the mean of its divisors is an integer number (2317746960).

Almost surely, 2^21432004342 is an apocalyptic number.

21432004342 is a deficient number, since it is larger than the sum of its proper divisors (15651947018).

21432004342 is a wasteful number, since it uses less digits than its factorization.

21432004342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14307195.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21432004342 its reverse (24340023412), we get a palindrome (45772027754).

The spelling of 21432004342 in words is "twenty-one billion, four hundred thirty-two million, four thousand, three hundred forty-two".