20442115313 has 2 divisors, whose sum is σ = 20442115314. Its totient is φ = 20442115312.

The previous prime is 20442115271. The next prime is 20442115319. The reversal of 20442115313 is 31351124402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15610753249 + 4831362064 = 124943^2 + 69508^2 .

It is a cyclic number.

It is not a de Polignac number, because 20442115313 - 2⁶ = 20442115249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20442115319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221057656 + 10221057657.

It is an arithmetic number, because the mean of its divisors is an integer number (10221057657).

Almost surely, 2^20442115313 is an apocalyptic number.

It is an amenable number.

20442115313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442115313 is an equidigital number, since it uses as much as digits as its factorization.

20442115313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 20442115313 its reverse (31351124402), we get a palindrome (51793239715).

The spelling of 20442115313 in words is "twenty billion, four hundred forty-two million, one hundred fifteen thousand, three hundred thirteen".