20040115 has 4 divisors (see below), whose sum is σ = 24048144. Its totient is φ = 16032088.

The previous prime is 20040071. The next prime is 20040133. The reversal of 20040115 is 51104002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20040115 - 2¹³ = 20031923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20040095 and 20040104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2004007 + ... + 2004016.

It is an arithmetic number, because the mean of its divisors is an integer number (6012036).

Almost surely, 2^20040115 is an apocalyptic number.

20040115 is a deficient number, since it is larger than the sum of its proper divisors (4008029).

20040115 is an equidigital number, since it uses as much as digits as its factorization.

20040115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4008028.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 20040115 is about 4476.6187016542. The cubic root of 20040115 is about 271.6231218969.

Adding to 20040115 its reverse (51104002), we get a palindrome (71144117).

The spelling of 20040115 in words is "twenty million, forty thousand, one hundred fifteen".