21204341342 has 16 divisors (see below), whose sum is σ = 31946400000. Its totient is φ = 10555597080.

The previous prime is 21204341311. The next prime is 21204341387. The reversal of 21204341342 is 24314340212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 799409 + ... + 825507.

It is an arithmetic number, because the mean of its divisors is an integer number (1996650000).

Almost surely, 2^21204341342 is an apocalyptic number.

21204341342 is a deficient number, since it is larger than the sum of its proper divisors (10742058658).

21204341342 is a wasteful number, since it uses less digits than its factorization.

21204341342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27871.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21204341342 its reverse (24314340212), we get a palindrome (45518681554).

The spelling of 21204341342 in words is "twenty-one billion, two hundred four million, three hundred forty-one thousand, three hundred forty-two".