20040011 has 4 divisors (see below), whose sum is σ = 20049000. Its totient is φ = 20031024.

The previous prime is 20039993. The next prime is 20040049. The reversal of 20040011 is 11004002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20040011 - 2¹⁰ = 20038987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20040071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1655 + ... + 6543.

It is an arithmetic number, because the mean of its divisors is an integer number (5012250).

Almost surely, 2^20040011 is an apocalyptic number.

20040011 is a deficient number, since it is larger than the sum of its proper divisors (8989).

20040011 is an equidigital number, since it uses as much as digits as its factorization.

20040011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8988.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20040011 is about 4476.6070857291. The cubic root of 20040011 is about 271.6226520251.

Adding to 20040011 its reverse (11004002), we get a palindrome (31044013).

It can be divided in two parts, 2004001 and 1, that added together give a palindrome (2004002).

The spelling of 20040011 in words is "twenty million, forty thousand, eleven".