20104266 has 32 divisors (see below), whose sum is σ = 49488768. Its totient is φ = 5302080.

The previous prime is 20104241. The next prime is 20104307. The reversal of 20104266 is 66240102.

It is a happy number.

It is a super-2 number, since 2×20104266² = 808363022797512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17865 + ... + 18956.

It is an arithmetic number, because the mean of its divisors is an integer number (1546524).

Almost surely, 2^20104266 is an apocalyptic number.

20104266 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20104266 is an abundant number, since it is smaller than the sum of its proper divisors (29384502).

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

20104266 is a wasteful number, since it uses less digits than its factorization.

20104266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36846.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20104266 is about 4483.7780944199. The cubic root of 20104266 is about 271.9126467619.

Adding to 20104266 its reverse (66240102), we get a palindrome (86344368).

The spelling of 20104266 in words is "twenty million, one hundred four thousand, two hundred sixty-six".