21795048 has 64 divisors (see below), whose sum is σ = 66052800. Its totient is φ = 6603840.

The previous prime is 21795043. The next prime is 21795079. The reversal of 21795048 is 84059712.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (21795043) 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, 2211 + ... + 6962.

It is an arithmetic number, because the mean of its divisors is an integer number (1032075).

Almost surely, 2^21795048 is an apocalyptic number.

It is an amenable number.

21795048 is an abundant number, since it is smaller than the sum of its proper divisors (44257752).

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

21795048 is a wasteful number, since it uses less digits than its factorization.

21795048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9199 (or 9189 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 21795048 is about 4668.5166809170. The cubic root of 21795048 is about 279.3310903469.

It can be divided in two parts, 2179 and 5048, that added together give a palindrome (7227).

The spelling of 21795048 in words is "twenty-one million, seven hundred ninety-five thousand, forty-eight".