10021812 has 24 divisors (see below), whose sum is σ = 23769312. Its totient is φ = 3285600.

The previous prime is 10021777. The next prime is 10021819. The reversal of 10021812 is 21812001.

It is a junction number, because it is equal to n+sod(n) for n = 10021791 and 10021800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021819) 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 7 ways as a sum of consecutive naturals, for example, 6114 + ... + 7577.

It is an arithmetic number, because the mean of its divisors is an integer number (990388).

Almost surely, 2^10021812 is an apocalyptic number.

10021812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10021812 is an abundant number, since it is smaller than the sum of its proper divisors (13747500).

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

10021812 is a wasteful number, since it uses less digits than its factorization.

10021812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13759 (or 13757 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 10021812 is about 3165.7245616130. The cubic root of 10021812 is about 215.5999970169.

Adding to 10021812 its reverse (21812001), we get a palindrome (31833813).

It can be divided in two parts, 100 and 21812, that added together give a palindrome (21912).

The spelling of 10021812 in words is "ten million, twenty-one thousand, eight hundred twelve".