21034004140342 has 32 divisors (see below), whose sum is σ = 33419109859200. Its totient is φ = 9912748073088.

The previous prime is 21034004140333. The next prime is 21034004140363. The reversal of 21034004140342 is 24304140043012.

It is a self number, because there is not a number n which added to its sum of digits gives 21034004140342.

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 15 ways as a sum of consecutive naturals, for example, 8857413 + ... + 10978240.

It is an arithmetic number, because the mean of its divisors is an integer number (1044347183100).

Almost surely, 2^{21034004140342} is an apocalyptic number.

21034004140342 is a deficient number, since it is larger than the sum of its proper divisors (12385105718858).

21034004140342 is a wasteful number, since it uses less digits than its factorization.

21034004140342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19836120.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21034004140342 its reverse (24304140043012), we get a palindrome (45338144183354).

The spelling of 21034004140342 in words is "twenty-one trillion, thirty-four billion, four million, one hundred forty thousand, three hundred forty-two".