21403420042334 has 16 divisors (see below), whose sum is σ = 35617401613440. Its totient is φ = 9563931913560.

The previous prime is 21403420042331. The next prime is 21403420042349. The reversal of 21403420042334 is 43324002430412.

It is a self number, because there is not a number n which added to its sum of digits gives 21403420042334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403420042331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8244767594 + ... + 8244770189.

It is an arithmetic number, because the mean of its divisors is an integer number (2226087600840).

Almost surely, 2^{21403420042334} is an apocalyptic number.

21403420042334 is a deficient number, since it is larger than the sum of its proper divisors (14213981571106).

21403420042334 is a wasteful number, since it uses less digits than its factorization.

21403420042334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16489537855.

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 21403420042334 its reverse (43324002430412), we get a palindrome (64727422472746).

The spelling of 21403420042334 in words is "twenty-one trillion, four hundred three billion, four hundred twenty million, forty-two thousand, three hundred thirty-four".