20120113 has 16 divisors (see below), whose sum is σ = 22720320. Its totient is φ = 17688384.

The previous prime is 20120081. The next prime is 20120143. The reversal of 20120113 is 31102102.

It is a cyclic number.

It is not a de Polignac number, because 20120113 - 2⁵ = 20120081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20120113.

It is not an unprimeable number, because it can be changed into a prime (20120143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30970 + ... + 31612.

It is an arithmetic number, because the mean of its divisors is an integer number (1420020).

Almost surely, 2^20120113 is an apocalyptic number.

It is an amenable number.

20120113 is a deficient number, since it is larger than the sum of its proper divisors (2600207).

20120113 is a wasteful number, since it uses less digits than its factorization.

20120113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 20120113 is about 4485.5448944359. The cubic root of 20120113 is about 271.9840722002.

Adding to 20120113 its reverse (31102102), we get a palindrome (51222215).

The spelling of 20120113 in words is "twenty million, one hundred twenty thousand, one hundred thirteen".