21773852 has 12 divisors (see below), whose sum is σ = 38137680. Its totient is φ = 10877376.

The previous prime is 21773849. The next prime is 21773863. The reversal of 21773852 is 25837712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6068 + ... + 8964.

It is an arithmetic number, because the mean of its divisors is an integer number (3178140).

Almost surely, 2^21773852 is an apocalyptic number.

It is an amenable number.

21773852 is a deficient number, since it is larger than the sum of its proper divisors (16363828).

21773852 is a wasteful number, since it uses less digits than its factorization.

21773852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4780 (or 4778 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 21773852 is about 4666.2460286616. The cubic root of 21773852 is about 279.2405097993.

The spelling of 21773852 in words is "twenty-one million, seven hundred seventy-three thousand, eight hundred fifty-two".