10021836 has 48 divisors (see below), whose sum is σ = 26627328. Its totient is φ = 2904000.

The previous prime is 10021831. The next prime is 10021853. The reversal of 10021836 is 63812001.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (10021831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1386 + ... + 4686.

It is an arithmetic number, because the mean of its divisors is an integer number (554736).

Almost surely, 2^10021836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10021836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13313664).

10021836 is an abundant number, since it is smaller than the sum of its proper divisors (16605492).

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

10021836 is a wasteful number, since it uses less digits than its factorization.

10021836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3342 (or 3340 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 10021836 is about 3165.7283522122. The cubic root of 10021836 is about 215.6001691213.

Adding to 10021836 its reverse (63812001), we get a palindrome (73833837).

The spelling of 10021836 in words is "ten million, twenty-one thousand, eight hundred thirty-six".