20486288169 has 6 divisors (see below), whose sum is σ = 29591305146. Its totient is φ = 13657525440.

The previous prime is 20486288161. The next prime is 20486288171. The reversal of 20486288169 is 96188268402.

20486288169 is a `hidden beast` number, since 2 + 0 + 4 + 8 + 628 + 8 + 1 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19123570944 + 1362717225 = 138288^2 + 36915^2 .

It is not a de Polignac number, because 20486288169 - 2³ = 20486288161 is a prime.

It is a super-2 number, since 2×20486288169² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20486288161) 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 in 5 ways as a sum of consecutive naturals, for example, 1138127112 + ... + 1138127129.

It is an arithmetic number, because the mean of its divisors is an integer number (4931884191).

Almost surely, 2^20486288169 is an apocalyptic number.

It is an amenable number.

20486288169 is a deficient number, since it is larger than the sum of its proper divisors (9105016977).

20486288169 is a wasteful number, since it uses less digits than its factorization.

20486288169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276254247 (or 2276254244 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The spelling of 20486288169 in words is "twenty billion, four hundred eighty-six million, two hundred eighty-eight thousand, one hundred sixty-nine".