20404113 has 8 divisors (see below), whose sum is σ = 27611808. Its totient is φ = 13399584.

The previous prime is 20404093. The next prime is 20404123. The reversal of 20404113 is 31140402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20404113 - 2⁶ = 20404049 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20404092 and 20404101.

It is not an unprimeable number, because it can be changed into a prime (20404123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50556 + ... + 50957.

It is an arithmetic number, because the mean of its divisors is an integer number (3451476).

Almost surely, 2^20404113 is an apocalyptic number.

It is an amenable number.

20404113 is a deficient number, since it is larger than the sum of its proper divisors (7207695).

20404113 is a wasteful number, since it uses less digits than its factorization.

20404113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101583.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20404113 is about 4517.0912100599. The cubic root of 20404113 is about 273.2578036732.

Adding to 20404113 its reverse (31140402), we get a palindrome (51544515).

The spelling of 20404113 in words is "twenty million, four hundred four thousand, one hundred thirteen".