21424034113516 has 12 divisors (see below), whose sum is σ = 37493716086288. Its totient is φ = 10711543803152.

The previous prime is 21424034113513. The next prime is 21424034113571. The reversal of 21424034113516 is 61531143042412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21424034113513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118211536 + ... + 118392631.

It is an arithmetic number, because the mean of its divisors is an integer number (3124476340524).

Almost surely, 2^{21424034113516} is an apocalyptic number.

It is an amenable number.

21424034113516 is a deficient number, since it is larger than the sum of its proper divisors (16069681972772).

21424034113516 is a wasteful number, since it uses less digits than its factorization.

21424034113516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236626808 (or 236626806 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 21424034113516 its reverse (61531143042412), we get a palindrome (82955177155928).

The spelling of 21424034113516 in words is "twenty-one trillion, four hundred twenty-four billion, thirty-four million, one hundred thirteen thousand, five hundred sixteen".