20121313004 has 24 divisors (see below), whose sum is σ = 37947212688. Its totient is φ = 9280324800.

The previous prime is 20121313001. The next prime is 20121313013. The reversal of 20121313004 is 40031312102.

It is not an unprimeable number, because it can be changed into a prime (20121313001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57887 + ... + 208790.

It is an arithmetic number, because the mean of its divisors is an integer number (1581133862).

Almost surely, 2^20121313004 is an apocalyptic number.

It is an amenable number.

20121313004 is a deficient number, since it is larger than the sum of its proper divisors (17825899684).

20121313004 is a wasteful number, since it uses less digits than its factorization.

20121313004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268145 (or 268143 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20121313004 its reverse (40031312102), we get a palindrome (60152625106).

The spelling of 20121313004 in words is "twenty billion, one hundred twenty-one million, three hundred thirteen thousand, four".