20157613169 has 2 divisors, whose sum is σ = 20157613170. Its totient is φ = 20157613168.

The previous prime is 20157613163. The next prime is 20157613187. The reversal of 20157613169 is 96131675102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18188028769 + 1969584400 = 134863^2 + 44380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20157613169 is a prime.

It is a super-2 number, since 2×20157613169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20157613163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10078806584 + 10078806585.

It is an arithmetic number, because the mean of its divisors is an integer number (10078806585).

Almost surely, 2^20157613169 is an apocalyptic number.

It is an amenable number.

20157613169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20157613169 is an equidigital number, since it uses as much as digits as its factorization.

20157613169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The spelling of 20157613169 in words is "twenty billion, one hundred fifty-seven million, six hundred thirteen thousand, one hundred sixty-nine".