20112304513 has 4 divisors (see below), whose sum is σ = 22985490880. Its totient is φ = 17239118148.

The previous prime is 20112304493. The next prime is 20112304519. The reversal of 20112304513 is 31540321102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20112304513 - 2⁵ = 20112304481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112304519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436593173 + ... + 1436593186.

It is an arithmetic number, because the mean of its divisors is an integer number (5746372720).

Almost surely, 2^20112304513 is an apocalyptic number.

It is an amenable number.

20112304513 is a deficient number, since it is larger than the sum of its proper divisors (2873186367).

20112304513 is an equidigital number, since it uses as much as digits as its factorization.

20112304513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2873186366.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 20112304513 its reverse (31540321102), we get a palindrome (51652625615).

The spelling of 20112304513 in words is "twenty billion, one hundred twelve million, three hundred four thousand, five hundred thirteen".