10718821 has 2 divisors, whose sum is σ = 10718822. Its totient is φ = 10718820.

The previous prime is 10718801. The next prime is 10718881. The reversal of 10718821 is 12881701.

10718821 is digitally balanced in base 2, 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., 10692900 + 25921 = 3270^2 + 161^2 .

It is a cyclic number.

It is not a de Polignac number, because 10718821 - 2⁷ = 10718693 is a prime.

It is a super-2 number, since 2×10718821² = 229786247260082, 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 10718821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10718801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5359410 + 5359411.

It is an arithmetic number, because the mean of its divisors is an integer number (5359411).

Almost surely, 2^10718821 is an apocalyptic number.

It is an amenable number.

10718821 is a deficient number, since it is larger than the sum of its proper divisors (1).

10718821 is an equidigital number, since it uses as much as digits as its factorization.

10718821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 10718821 is about 3273.9610565796. The cubic root of 10718821 is about 220.4866705572.

The spelling of 10718821 in words is "ten million, seven hundred eighteen thousand, eight hundred twenty-one".