21166975150 has 48 divisors (see below), whose sum is σ = 40675789440. Its totient is φ = 8186572800.

The previous prime is 21166975129. The next prime is 21166975229. The reversal of 21166975150 is 5157966112.

It is a junction number, because it is equal to n+sod(n) for n = 21166975097 and 21166975106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2005086 + ... + 2015614.

It is an arithmetic number, because the mean of its divisors is an integer number (847412280).

Almost surely, 2^21166975150 is an apocalyptic number.

21166975150 is a deficient number, since it is larger than the sum of its proper divisors (19508814290).

21166975150 is a wasteful number, since it uses less digits than its factorization.

21166975150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11869 (or 11864 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 43.

The spelling of 21166975150 in words is "twenty-one billion, one hundred sixty-six million, nine hundred seventy-five thousand, one hundred fifty".