21866370261150 has 48 divisors (see below), whose sum is σ = 55382398228224. Its totient is φ = 5706967555680.

The previous prime is 21866370261143. The next prime is 21866370261161. The reversal of 21866370261150 is 5116207366812.

It is a self number, because there is not a number n which added to its sum of digits gives 21866370261150.

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 23 ways as a sum of consecutive naturals, for example, 1550799352 + ... + 1550813451.

It is an arithmetic number, because the mean of its divisors is an integer number (1153799963088).

Almost surely, 2^{21866370261150} is an apocalyptic number.

21866370261150 is an abundant number, since it is smaller than the sum of its proper divisors (33516027967074).

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

21866370261150 is a wasteful number, since it uses less digits than its factorization.

21866370261150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101612865 (or 3101612860 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 21866370261150 in words is "twenty-one trillion, eight hundred sixty-six billion, three hundred seventy million, two hundred sixty-one thousand, one hundred fifty".