20104312 has 8 divisors (see below), whose sum is σ = 37695600. Its totient is φ = 10052152.

The previous prime is 20104307. The next prime is 20104313. The reversal of 20104312 is 21340102.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 20104292 and 20104301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20104313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256512 + ... + 1256527.

It is an arithmetic number, because the mean of its divisors is an integer number (4711950).

Almost surely, 2^20104312 is an apocalyptic number.

It is an amenable number.

20104312 is a deficient number, since it is larger than the sum of its proper divisors (17591288).

20104312 is a wasteful number, since it uses less digits than its factorization.

20104312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513045 (or 2513041 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20104312 is about 4483.7832240196. The cubic root of 20104312 is about 271.9128541470.

Adding to 20104312 its reverse (21340102), we get a palindrome (41444414).

The spelling of 20104312 in words is "twenty million, one hundred four thousand, three hundred twelve".