21852772 has 12 divisors (see below), whose sum is σ = 39132016. Its totient is φ = 10672200.

The previous prime is 21852767. The next prime is 21852773. The reversal of 21852772 is 27725812.

It is not an unprimeable number, because it can be changed into a prime (21852773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63354 + ... + 63697.

Almost surely, 2^21852772 is an apocalyptic number.

It is an amenable number.

21852772 is a deficient number, since it is larger than the sum of its proper divisors (17279244).

21852772 is a wasteful number, since it uses less digits than its factorization.

21852772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127098 (or 127096 counting only the distinct ones).

The product of its digits is 15680, while the sum is 34.

The square root of 21852772 is about 4674.6948563516. The cubic root of 21852772 is about 279.5774749677.

The spelling of 21852772 in words is "twenty-one million, eight hundred fifty-two thousand, seven hundred seventy-two".