20130104 has 8 divisors (see below), whose sum is σ = 37743960. Its totient is φ = 10065048.

The previous prime is 20130079. The next prime is 20130163. The reversal of 20130104 is 40103102.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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, 1258124 + ... + 1258139.

It is an arithmetic number, because the mean of its divisors is an integer number (4717995).

Almost surely, 2^20130104 is an apocalyptic number.

It is an amenable number.

20130104 is a deficient number, since it is larger than the sum of its proper divisors (17613856).

20130104 is a wasteful number, since it uses less digits than its factorization.

20130104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516269 (or 2516265 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20130104 is about 4486.6584447671. The cubic root of 20130104 is about 272.0290842602.

Adding to 20130104 its reverse (40103102), we get a palindrome (60233206).

The spelling of 20130104 in words is "twenty million, one hundred thirty thousand, one hundred four".