10818021 has 16 divisors (see below), whose sum is σ = 14805504. Its totient is φ = 7023984.

The previous prime is 10818013. The next prime is 10818029. The reversal of 10818021 is 12081801.

It is an interprime number because it is at equal distance from previous prime (10818013) and next prime (10818029).

It is not a de Polignac number, because 10818021 - 2³ = 10818013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10818029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21256 + ... + 21758.

It is an arithmetic number, because the mean of its divisors is an integer number (925344).

Almost surely, 2^10818021 is an apocalyptic number.

It is an amenable number.

10818021 is a deficient number, since it is larger than the sum of its proper divisors (3987483).

10818021 is a wasteful number, since it uses less digits than its factorization.

10818021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 10818021 is about 3289.0760100673. The cubic root of 10818021 is about 221.1647659175.

Adding to 10818021 its reverse (12081801), we get a palindrome (22899822).

The spelling of 10818021 in words is "ten million, eight hundred eighteen thousand, twenty-one".