20323666 has 16 divisors (see below), whose sum is σ = 33364800. Its totient is φ = 9208080.

The previous prime is 20323661. The next prime is 20323669. The reversal of 20323666 is 66632302.

It is not an unprimeable number, because it can be changed into a prime (20323661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6355 + ... + 9001.

It is an arithmetic number, because the mean of its divisors is an integer number (2085300).

Almost surely, 2^20323666 is an apocalyptic number.

20323666 is a deficient number, since it is larger than the sum of its proper divisors (13041134).

20323666 is a wasteful number, since it uses less digits than its factorization.

20323666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 20323666 is about 4508.1776806155. The cubic root of 20323666 is about 272.8982074754.

Adding to 20323666 its reverse (66632302), we get a palindrome (86955968).

It can be divided in two parts, 203236 and 66, that added together give a palindrome (203302).

The spelling of 20323666 in words is "twenty million, three hundred twenty-three thousand, six hundred sixty-six".