18893888839881 has 96 divisors (see below), whose sum is σ = 32453910852480. Its totient is φ = 10468996761600.

The previous prime is 18893888839751. The next prime is 18893888839921.

It is a happy number.

18893888839881 is a `hidden beast` number, since 188 + 9 + 38 + 8 + 8 + 8 + 398 + 8 + 1 = 666.

18893888839881 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18893888839881 - 2⁹ = 18893888839369 is a prime.

It is a super-2 number, since 2×18893888839881² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18893888839791 and 18893888839800.

It is not an unprimeable number, because it can be changed into a prime (18893888834881) 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, 4527825 + ... + 7634721.

It is an arithmetic number, because the mean of its divisors is an integer number (338061571380).

Almost surely, 2^{18893888839881} is an apocalyptic number.

18893888839881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18893888839881 is a deficient number, since it is larger than the sum of its proper divisors (13560022012599).

18893888839881 is a wasteful number, since it uses less digits than its factorization.

18893888839881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107047 (or 3107044 counting only the distinct ones).

The product of its digits is 12230590464, while the sum is 90.

The spelling of 18893888839881 in words is "eighteen trillion, eight hundred ninety-three billion, eight hundred eighty-eight million, eight hundred thirty-nine thousand, eight hundred eighty-one".