18897577579881 has 96 divisors (see below), whose sum is σ = 37397804371200. Its totient is φ = 9061775251200.

The previous prime is 18897577579879. The next prime is 18897577579913.

18897577579881 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18897577579881 - 2¹ = 18897577579879 is a prime.

It is a super-2 number, since 2×18897577579881² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18897577579791 and 18897577579800.

It is not an unprimeable number, because it can be changed into a prime (18897577579841) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20962980 + ... + 21845861.

It is an arithmetic number, because the mean of its divisors is an integer number (389560462200).

Almost surely, 2^{18897577579881} is an apocalyptic number.

18897577579881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18897577579881 is a deficient number, since it is larger than the sum of its proper divisors (18500226791319).

18897577579881 is a wasteful number, since it uses less digits than its factorization.

18897577579881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42808892 (or 42808875 counting only the distinct ones).

The product of its digits is 19914854400, while the sum is 90.

The spelling of 18897577579881 in words is "eighteen trillion, eight hundred ninety-seven billion, five hundred seventy-seven million, five hundred seventy-nine thousand, eight hundred eighty-one".