10618021 has 2 divisors, whose sum is σ = 10618022. Its totient is φ = 10618020.

The previous prime is 10618007. The next prime is 10618039. The reversal of 10618021 is 12081601.

10618021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7236100 + 3381921 = 2690^2 + 1839^2 .

It is a cyclic number.

It is not a de Polignac number, because 10618021 - 2⁵ = 10617989 is a prime.

It is a super-2 number, since 2×10618021² = 225484739912882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10618021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10648021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5309010 + 5309011.

It is an arithmetic number, because the mean of its divisors is an integer number (5309011).

Almost surely, 2^10618021 is an apocalyptic number.

It is an amenable number.

10618021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10618021 is an equidigital number, since it uses as much as digits as its factorization.

10618021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 10618021 is about 3258.5304970186. The cubic root of 10618021 is about 219.7933389878.

Adding to 10618021 its reverse (12081601), we get a palindrome (22699622).

The spelling of 10618021 in words is "ten million, six hundred eighteen thousand, twenty-one".