21110848866 has 24 divisors (see below), whose sum is σ = 45844381440. Its totient is φ = 7020917496.

The previous prime is 21110848841. The next prime is 21110848867. The reversal of 21110848866 is 66884801112.

21110848866 is a `hidden beast` number, since 2 + 1 + 1 + 108 + 488 + 66 = 666.

It is not an unprimeable number, because it can be changed into a prime (21110848867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1327890 + ... + 1343693.

It is an arithmetic number, because the mean of its divisors is an integer number (1910182560).

Almost surely, 2^21110848866 is an apocalyptic number.

21110848866 is an abundant number, since it is smaller than the sum of its proper divisors (24733532574).

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

21110848866 is a wasteful number, since it uses less digits than its factorization.

21110848866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2672030 (or 2672027 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The spelling of 21110848866 in words is "twenty-one billion, one hundred ten million, eight hundred forty-eight thousand, eight hundred sixty-six".