20130105 has 8 divisors (see below), whose sum is σ = 32208192. Its totient is φ = 10736048.

The previous prime is 20130079. The next prime is 20130163. The reversal of 20130105 is 50103102.

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

It is a cyclic number.

It is not a de Polignac number, because 20130105 - 2¹² = 20126009 is a prime.

It is a super-2 number, since 2×20130105² = 810442254622050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670989 + ... + 671018.

It is an arithmetic number, because the mean of its divisors is an integer number (4026024).

Almost surely, 2^20130105 is an apocalyptic number.

It is an amenable number.

20130105 is a deficient number, since it is larger than the sum of its proper divisors (12078087).

20130105 is a wasteful number, since it uses less digits than its factorization.

20130105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342015.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 20130105 is about 4486.6585562086. The cubic root of 20130105 is about 272.0290887647.

Adding to 20130105 its reverse (50103102), we get a palindrome (70233207).

The spelling of 20130105 in words is "twenty million, one hundred thirty thousand, one hundred five".