20043166 has 48 divisors (see below), whose sum is σ = 37269792. Its totient is φ = 8015040.

The previous prime is 20043161. The next prime is 20043181. The reversal of 20043166 is 66134002.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72220 + ... + 72496.

It is an arithmetic number, because the mean of its divisors is an integer number (776454).

Almost surely, 2^20043166 is an apocalyptic number.

20043166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20043166 is a deficient number, since it is larger than the sum of its proper divisors (17226626).

20043166 is a wasteful number, since it uses less digits than its factorization.

20043166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20043166 is about 4476.9594592759. The cubic root of 20043166 is about 271.6369055851.

Adding to 20043166 its reverse (66134002), we get a palindrome (86177168).

The spelling of 20043166 in words is "twenty million, forty-three thousand, one hundred sixty-six".