21766150 has 24 divisors (see below), whose sum is σ = 46269360. Its totient is φ = 7462560.

The previous prime is 21766141. The next prime is 21766163. The reversal of 21766150 is 5166712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30745 + ... + 31444.

It is an arithmetic number, because the mean of its divisors is an integer number (1927890).

Almost surely, 2^21766150 is an apocalyptic number.

21766150 is an abundant number, since it is smaller than the sum of its proper divisors (24503210).

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

21766150 is a wasteful number, since it uses less digits than its factorization.

21766150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62208 (or 62203 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 21766150 is about 4665.4206669924. The cubic root of 21766150 is about 279.2075809443.

The spelling of 21766150 in words is "twenty-one million, seven hundred sixty-six thousand, one hundred fifty".