21852056 has 16 divisors (see below), whose sum is σ = 41023800. Its totient is φ = 10912384.

The previous prime is 21852037. The next prime is 21852067. The reversal of 21852056 is 65025812.

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, 9200 + ... + 11328.

Almost surely, 2^21852056 is an apocalyptic number.

It is an amenable number.

21852056 is a deficient number, since it is larger than the sum of its proper divisors (19171744).

21852056 is a wasteful number, since it uses less digits than its factorization.

21852056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418 (or 3414 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 21852056 is about 4674.6182731855. The cubic root of 21852056 is about 279.5744215083.

Adding to 21852056 its reverse (65025812), we get a palindrome (86877868).

The spelling of 21852056 in words is "twenty-one million, eight hundred fifty-two thousand, fifty-six".