20103666 has 24 divisors (see below), whose sum is σ = 44196432. Its totient is φ = 6091800.

The previous prime is 20103659. The next prime is 20103667. The reversal of 20103666 is 66630102.

It is not an unprimeable number, because it can be changed into a prime (20103667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13120 + ... + 14571.

It is an arithmetic number, because the mean of its divisors is an integer number (1841518).

Almost surely, 2^20103666 is an apocalyptic number.

20103666 is an abundant number, since it is smaller than the sum of its proper divisors (24092766).

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

20103666 is a wasteful number, since it uses less digits than its factorization.

20103666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27718 (or 27707 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 20103666 is about 4483.7111860600. The cubic root of 20103666 is about 271.9099417107.

Adding to 20103666 its reverse (66630102), we get a palindrome (86733768).

It can be divided in two parts, 201036 and 66, that added together give a palindrome (201102).

The spelling of 20103666 in words is "twenty million, one hundred three thousand, six hundred sixty-six".