21266363036316 has 96 divisors (see below), whose sum is σ = 53495889108480. Its totient is φ = 6550746476544.

The previous prime is 21266363036209. The next prime is 21266363036323. The reversal of 21266363036316 is 61363036366212.

It is a happy number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 8832180 + ... + 10979076.

It is an arithmetic number, because the mean of its divisors is an integer number (557248844880).

Almost surely, 2^{21266363036316} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21266363036316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26747944554240).

21266363036316 is an abundant number, since it is smaller than the sum of its proper divisors (32229526072164).

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

21266363036316 is a wasteful number, since it uses less digits than its factorization.

21266363036316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147803 (or 2147801 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 48.

The spelling of 21266363036316 in words is "twenty-one trillion, two hundred sixty-six billion, three hundred sixty-three million, thirty-six thousand, three hundred sixteen".