20315111421607 has 2 divisors, whose sum is σ = 20315111421608. Its totient is φ = 20315111421606.

The previous prime is 20315111421569. The next prime is 20315111421643. The reversal of 20315111421607 is 70612411151302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20315111421607 - 2²⁷ = 20314977203879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20315111421697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157555710803 + 10157555710804.

It is an arithmetic number, because the mean of its divisors is an integer number (10157555710804).

Almost surely, 2^{20315111421607} is an apocalyptic number.

20315111421607 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315111421607 is an equidigital number, since it uses as much as digits as its factorization.

20315111421607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

Adding to 20315111421607 its reverse (70612411151302), we get a palindrome (90927522572909).

The spelling of 20315111421607 in words is "twenty trillion, three hundred fifteen billion, one hundred eleven million, four hundred twenty-one thousand, six hundred seven".