20266368 has 64 divisors (see below), whose sum is σ = 54529200. Its totient is φ = 6668288.

The previous prime is 20266349. The next prime is 20266391. The reversal of 20266368 is 86366202.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×20266368² = 821451343822848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33880 + ... + 34472.

Almost surely, 2^20266368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20266368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27264600).

20266368 is an abundant number, since it is smaller than the sum of its proper divisors (34262832).

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

20266368 is an equidigital number, since it uses as much as digits as its factorization.

20266368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699 (or 687 counting only the distinct ones).

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

The square root of 20266368 is about 4501.8182993097. The cubic root of 20266368 is about 272.6415077392.

The spelling of 20266368 in words is "twenty million, two hundred sixty-six thousand, three hundred sixty-eight".