21316420666300 has 72 divisors (see below), whose sum is σ = 46921969301760. Its totient is φ = 8404293393600.

The previous prime is 21316420666243. The next prime is 21316420666301. The reversal of 21316420666300 is 366602461312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21316420666301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2338935 + ... + 6935665.

It is an arithmetic number, because the mean of its divisors is an integer number (651694018080).

Almost surely, 2^{21316420666300} is an apocalyptic number.

21316420666300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21316420666300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23460984650880).

21316420666300 is an abundant number, since it is smaller than the sum of its proper divisors (25605548635460).

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

21316420666300 is a wasteful number, since it uses less digits than its factorization.

21316420666300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4597411 (or 4597404 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 40.

The spelling of 21316420666300 in words is "twenty-one trillion, three hundred sixteen billion, four hundred twenty million, six hundred sixty-six thousand, three hundred".