18547427127969 has 6 divisors (see below), whose sum is σ = 26790728073746. Its totient is φ = 12364951418640.

The previous prime is 18547427127961. The next prime is 18547427127973. The reversal of 18547427127969 is 96972172474581.

18547427127969 is a `hidden beast` number, since 1 + 8 + 5 + 474 + 2 + 71 + 27 + 9 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10284464163600 + 8262962964369 = 3206940^2 + 2874537^2 .

It is not a de Polignac number, because 18547427127969 - 2³ = 18547427127961 is a prime.

It is a super-2 number, since 2×18547427127969² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18547427127897 and 18547427127906.

It is not an unprimeable number, because it can be changed into a prime (18547427127961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1030412618212 + ... + 1030412618229.

Almost surely, 2^{18547427127969} is an apocalyptic number.

It is an amenable number.

18547427127969 is a deficient number, since it is larger than the sum of its proper divisors (8243300945777).

18547427127969 is a wasteful number, since it uses less digits than its factorization.

18547427127969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060825236447 (or 2060825236444 counting only the distinct ones).

The product of its digits is 426746880, while the sum is 72.

The spelling of 18547427127969 in words is "eighteen trillion, five hundred forty-seven billion, four hundred twenty-seven million, one hundred twenty-seven thousand, nine hundred sixty-nine".