21852010 has 8 divisors (see below), whose sum is σ = 39333636. Its totient is φ = 8740800.

The previous prime is 21851989. The next prime is 21852011. The reversal of 21852010 is 1025812.

It can be written as a sum of positive squares in 2 ways, for example, as 21650409 + 201601 = 4653^2 + 449^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1092591 + ... + 1092610.

Almost surely, 2^21852010 is an apocalyptic number.

21852010 is a deficient number, since it is larger than the sum of its proper divisors (17481626).

21852010 is a wasteful number, since it uses less digits than its factorization.

21852010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185208.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 21852010 is about 4674.6133529951. The cubic root of 21852010 is about 279.5742253341.

Adding to 21852010 its reverse (1025812), we get a palindrome (22877822).

The spelling of 21852010 in words is "twenty-one million, eight hundred fifty-two thousand, ten".