21116034325660 has 24 divisors (see below), whose sum is σ = 44346969331056. Its totient is φ = 8445785683200.

The previous prime is 21116034325649. The next prime is 21116034325667. The reversal of 21116034325660 is 6652343061112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21116034325667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38977197 + ... + 39515236.

It is an arithmetic number, because the mean of its divisors is an integer number (1847790388794).

Almost surely, 2^{21116034325660} is an apocalyptic number.

21116034325660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21116034325660 is an abundant number, since it is smaller than the sum of its proper divisors (23230935005396).

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

21116034325660 is a wasteful number, since it uses less digits than its factorization.

21116034325660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78505893 (or 78505891 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

Adding to 21116034325660 its reverse (6652343061112), we get a palindrome (27768377386772).

The spelling of 21116034325660 in words is "twenty-one trillion, one hundred sixteen billion, thirty-four million, three hundred twenty-five thousand, six hundred sixty".