20104087 has 8 divisors (see below), whose sum is σ = 20524032. Its totient is φ = 19687800.

The previous prime is 20104067. The next prime is 20104129. The reversal of 20104087 is 78040102.

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-20104087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104067) by changing a digit.

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, 12012 + ... + 13582.

It is an arithmetic number, because the mean of its divisors is an integer number (2565504).

Almost surely, 2^20104087 is an apocalyptic number.

20104087 is a deficient number, since it is larger than the sum of its proper divisors (419945).

20104087 is a wasteful number, since it uses less digits than its factorization.

20104087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 20104087 is about 4483.7581335304. The cubic root of 20104087 is about 271.9118397606.

Adding to 20104087 its reverse (78040102), we get a palindrome (98144189).

The spelling of 20104087 in words is "twenty million, one hundred four thousand, eighty-seven".