21776852 has 24 divisors (see below), whose sum is σ = 39160800. Its totient is φ = 10591776.

The previous prime is 21776851. The next prime is 21776857. The reversal of 21776852 is 25867712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21776851) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 29099 + ... + 29837.

It is an arithmetic number, because the mean of its divisors is an integer number (1631700).

Almost surely, 2^21776852 is an apocalyptic number.

It is an amenable number.

21776852 is a deficient number, since it is larger than the sum of its proper divisors (17383948).

21776852 is a wasteful number, since it uses less digits than its factorization.

21776852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935 (or 933 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 21776852 is about 4666.5674751363. The cubic root of 21776852 is about 279.2533337905.

The spelling of 21776852 in words is "twenty-one million, seven hundred seventy-six thousand, eight hundred fifty-two".