21795852 has 48 divisors (see below), whose sum is σ = 56548352. Its totient is φ = 6488640.

The previous prime is 21795847. The next prime is 21795857. The reversal of 21795852 is 25859712.

It is an interprime number because it is at equal distance from previous prime (21795847) and next prime (21795857).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 21795852.

It is not an unprimeable number, because it can be changed into a prime (21795857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2583 + ... + 7089.

Almost surely, 2^21795852 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21795852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28274176).

21795852 is an abundant number, since it is smaller than the sum of its proper divisors (34752500).

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

21795852 is a wasteful number, since it uses less digits than its factorization.

21795852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4558 (or 4556 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 21795852 is about 4668.6027888438. The cubic root of 21795852 is about 279.3345250634.

It can be divided in two parts, 217 and 95852, that added together give a palindrome (96069).

The spelling of 21795852 in words is "twenty-one million, seven hundred ninety-five thousand, eight hundred fifty-two".