20326866 has 80 divisors (see below), whose sum is σ = 50821344. Its totient is φ = 5400192.

The previous prime is 20326841. The next prime is 20326879. The reversal of 20326866 is 66862302.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 244861 + ... + 244943.

Almost surely, 2^20326866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20326866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25410672).

20326866 is an abundant number, since it is smaller than the sum of its proper divisors (30494478).

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

20326866 is an equidigital number, since it uses as much as digits as its factorization.

20326866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 20326866 is about 4508.5325772362. The cubic root of 20326866 is about 272.9125295050.

The spelling of 20326866 in words is "twenty million, three hundred twenty-six thousand, eight hundred sixty-six".