20004666 has 32 divisors (see below), whose sum is σ = 44093376. Its totient is φ = 6000000.

The previous prime is 20004583. The next prime is 20004667. The reversal of 20004666 is 66640002.

It is not an unprimeable number, because it can be changed into a prime (20004667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5166 + ... + 8166.

It is an arithmetic number, because the mean of its divisors is an integer number (1377918).

Almost surely, 2^20004666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20004666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22046688).

20004666 is an abundant number, since it is smaller than the sum of its proper divisors (24088710).

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

20004666 is a wasteful number, since it uses less digits than its factorization.

20004666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3118.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20004666 is about 4472.6575992356. The cubic root of 20004666 is about 271.4628691391.

Adding to 20004666 its reverse (66640002), we get a palindrome (86644668).

It can be divided in two parts, 2000 and 4666, that added together give a palindrome (6666).

The spelling of 20004666 in words is "twenty million, four thousand, six hundred sixty-six".