21116034325650 has 48 divisors (see below), whose sum is σ = 57128471052768. Its totient is φ = 5119038624000.

The previous prime is 21116034325649. The next prime is 21116034325667. The reversal of 21116034325650 is 5652343061112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21116034325599 and 21116034325608.

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 23 ways as a sum of consecutive naturals, for example, 6398796631 + ... + 6398799930.

It is an arithmetic number, because the mean of its divisors is an integer number (1190176480266).

Almost surely, 2^{21116034325650} is an apocalyptic number.

21116034325650 is an abundant number, since it is smaller than the sum of its proper divisors (36012436727118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21116034325650 is a wasteful number, since it uses less digits than its factorization.

21116034325650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12797596587 (or 12797596582 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

Adding to 21116034325650 its reverse (5652343061112), we get a palindrome (26768377386762).

The spelling of 21116034325650 in words is "twenty-one trillion, one hundred sixteen billion, thirty-four million, three hundred twenty-five thousand, six hundred fifty".