20115404 has 12 divisors (see below), whose sum is σ = 36337728. Its totient is φ = 9733200.

The previous prime is 20115397. The next prime is 20115413. The reversal of 20115404 is 40451102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80987 + ... + 81234.

It is an arithmetic number, because the mean of its divisors is an integer number (3028144).

Almost surely, 2^20115404 is an apocalyptic number.

It is an amenable number.

20115404 is a deficient number, since it is larger than the sum of its proper divisors (16222324).

20115404 is a wasteful number, since it uses less digits than its factorization.

20115404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162256 (or 162254 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 20115404 is about 4485.0199553625. The cubic root of 20115404 is about 271.9628517606.

Adding to 20115404 its reverse (40451102), we get a palindrome (60566506).

The spelling of 20115404 in words is "twenty million, one hundred fifteen thousand, four hundred four".