20104015 has 8 divisors (see below), whose sum is σ = 24638400. Its totient is φ = 15740832.

The previous prime is 20104003. The next prime is 20104031. The reversal of 20104015 is 51040102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20104015 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20103986 and 20104004.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 42540 + ... + 43009.

It is an arithmetic number, because the mean of its divisors is an integer number (3079800).

Almost surely, 2^20104015 is an apocalyptic number.

20104015 is a deficient number, since it is larger than the sum of its proper divisors (4534385).

20104015 is an equidigital number, since it uses as much as digits as its factorization.

20104015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85601.

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

The square root of 20104015 is about 4483.7501045442. The cubic root of 20104015 is about 271.9115151554.

Adding to 20104015 its reverse (51040102), we get a palindrome (71144117).

The spelling of 20104015 in words is "twenty million, one hundred four thousand, fifteen".