21675150 has 108 divisors (see below), whose sum is σ = 67810392. Its totient is φ = 4949280.

The previous prime is 21675133. The next prime is 21675167. The reversal of 21675150 is 5157612.

It is an interprime number because it is at equal distance from previous prime (21675133) and next prime (21675167).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 21559 + ... + 22541.

It is an arithmetic number, because the mean of its divisors is an integer number (627874).

Almost surely, 2^21675150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21675150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33905196).

21675150 is an abundant number, since it is smaller than the sum of its proper divisors (46135242).

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

21675150 is a wasteful number, since it uses less digits than its factorization.

21675150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 21675150 is about 4655.6578482530. The cubic root of 21675150 is about 278.8179333982.

The spelling of 21675150 in words is "twenty-one million, six hundred seventy-five thousand, one hundred fifty".