10213866 has 24 divisors (see below), whose sum is σ = 23832900. Its totient is φ = 3142656.

The previous prime is 10213837. The next prime is 10213867. The reversal of 10213866 is 66831201.

It can be written as a sum of positive squares in 2 ways, for example, as 9828225 + 385641 = 3135^2 + 621^2 .

It is not an unprimeable number, because it can be changed into a prime (10213867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21591 + ... + 22058.

Almost surely, 2^10213866 is an apocalyptic number.

10213866 is an abundant number, since it is smaller than the sum of its proper divisors (13619034).

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

10213866 is a wasteful number, since it uses less digits than its factorization.

10213866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43670 (or 43667 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 10213866 is about 3195.9139537854. The cubic root of 10213866 is about 216.9685160351.

The spelling of 10213866 in words is "ten million, two hundred thirteen thousand, eight hundred sixty-six".