20315117674147 has 2 divisors, whose sum is σ = 20315117674148. Its totient is φ = 20315117674146.

The previous prime is 20315117674123. The next prime is 20315117674177. The reversal of 20315117674147 is 74147671151302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20315117674147 is a prime.

It is a super-2 number, since 2×20315117674147² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20315117674147.

It is not a weakly prime, because it can be changed into another prime (20315117674177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10157558837073 + 10157558837074.

It is an arithmetic number, because the mean of its divisors is an integer number (10157558837074).

Almost surely, 2^{20315117674147} is an apocalyptic number.

20315117674147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20315117674147 is an equidigital number, since it uses as much as digits as its factorization.

20315117674147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 987840, while the sum is 49.

The spelling of 20315117674147 in words is "twenty trillion, three hundred fifteen billion, one hundred seventeen million, six hundred seventy-four thousand, one hundred forty-seven".