21883168 has 24 divisors (see below), whose sum is σ = 44569980. Its totient is φ = 10563840.

The previous prime is 21883151. The next prime is 21883181. The reversal of 21883168 is 86138812.

It can be written as a sum of positive squares in 2 ways, for example, as 21641104 + 242064 = 4652^2 + 492^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10863 + ... + 12718.

Almost surely, 2^21883168 is an apocalyptic number.

It is an amenable number.

21883168 is an abundant number, since it is smaller than the sum of its proper divisors (22686812).

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

21883168 is a wasteful number, since it uses less digits than its factorization.

21883168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23620 (or 23612 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 21883168 is about 4677.9448479006. The cubic root of 21883168 is about 279.7070405269.

It can be divided in two parts, 2188 and 3168, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 21883168 in words is "twenty-one million, eight hundred eighty-three thousand, one hundred sixty-eight".