20112442513 has 2 divisors, whose sum is σ = 20112442514. Its totient is φ = 20112442512.

The previous prime is 20112442487. The next prime is 20112442531. The reversal of 20112442513 is 31524421102.

Together with next prime (20112442531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13065175809 + 7047266704 = 114303^2 + 83948^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112442513 - 2²¹ = 20110345361 is a prime.

It is not a weakly prime, because it can be changed into another prime (20112442543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056221256 + 10056221257.

It is an arithmetic number, because the mean of its divisors is an integer number (10056221257).

Almost surely, 2^20112442513 is an apocalyptic number.

It is an amenable number.

20112442513 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112442513 is an equidigital number, since it uses as much as digits as its factorization.

20112442513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 20112442513 its reverse (31524421102), we get a palindrome (51636863615).

The spelling of 20112442513 in words is "twenty billion, one hundred twelve million, four hundred forty-two thousand, five hundred thirteen".