21852016 has 20 divisors (see below), whose sum is σ = 43372224. Its totient is φ = 10659200.

The previous prime is 21852013. The next prime is 21852029. The reversal of 21852016 is 61025812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21852011) 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, 16000 + ... + 17311.

Almost surely, 2^21852016 is an apocalyptic number.

It is an amenable number.

21852016 is a deficient number, since it is larger than the sum of its proper divisors (21520208).

21852016 is a wasteful number, since it uses less digits than its factorization.

21852016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33360 (or 33354 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 21852016 is about 4674.6139947594. The cubic root of 21852016 is about 279.5742509220.

Adding to 21852016 its reverse (61025812), we get a palindrome (82877828).

The spelling of 21852016 in words is "twenty-one million, eight hundred fifty-two thousand, sixteen".