21795066 has 48 divisors (see below), whose sum is σ = 50038560. Its totient is φ = 6844320.

The previous prime is 21795043. The next prime is 21795079. The reversal of 21795066 is 66059712.

It is a self number, because there is not a number n which added to its sum of digits gives 21795066.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21961 + ... + 22931.

It is an arithmetic number, because the mean of its divisors is an integer number (1042470).

Almost surely, 2^21795066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21795066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25019280).

21795066 is an abundant number, since it is smaller than the sum of its proper divisors (28243494).

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

21795066 is a wasteful number, since it uses less digits than its factorization.

21795066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051 (or 1048 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 21795066 is about 4668.5186087238. The cubic root of 21795066 is about 279.3311672445.

The spelling of 21795066 in words is "twenty-one million, seven hundred ninety-five thousand, sixty-six".