20040115169 has 2 divisors, whose sum is σ = 20040115170. Its totient is φ = 20040115168.

The previous prime is 20040115111. The next prime is 20040115187. The reversal of 20040115169 is 96151104002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16709440225 + 3330674944 = 129265^2 + 57712^2 .

It is a cyclic number.

It is not a de Polignac number, because 20040115169 - 2¹² = 20040111073 is a prime.

It is a super-2 number, since 2×20040115169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20040115189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10020057584 + 10020057585.

It is an arithmetic number, because the mean of its divisors is an integer number (10020057585).

Almost surely, 2^20040115169 is an apocalyptic number.

It is an amenable number.

20040115169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20040115169 is an equidigital number, since it uses as much as digits as its factorization.

20040115169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The spelling of 20040115169 in words is "twenty billion, forty million, one hundred fifteen thousand, one hundred sixty-nine".