21852042 has 16 divisors (see below), whose sum is σ = 43999200. Its totient is φ = 7234832.

The previous prime is 21852037. The next prime is 21852067. The reversal of 21852042 is 24025812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11328 + ... + 13115.

It is an arithmetic number, because the mean of its divisors is an integer number (2749950).

Almost surely, 2^21852042 is an apocalyptic number.

21852042 is an abundant number, since it is smaller than the sum of its proper divisors (22147158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21852042 is a wasteful number, since it uses less digits than its factorization.

21852042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24597.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 21852042 is about 4674.6167757368. The cubic root of 21852042 is about 279.5743618031.

Adding to 21852042 its reverse (24025812), we get a palindrome (45877854).

The spelling of 21852042 in words is "twenty-one million, eight hundred fifty-two thousand, forty-two".