18869896881 has 72 divisors (see below), whose sum is σ = 31764026112. Its totient is φ = 10767556800.

The previous prime is 18869896823. The next prime is 18869896891.

It is a happy number.

18869896881 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18869896881 - 2⁹ = 18869896369 is a prime.

It is a super-2 number, since 2×18869896881² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18869896891) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1241530 + ... + 1256636.

Almost surely, 2^18869896881 is an apocalyptic number.

18869896881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18869896881 is a deficient number, since it is larger than the sum of its proper divisors (12894129231).

18869896881 is a wasteful number, since it uses less digits than its factorization.

18869896881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15203 (or 15189 counting only the distinct ones).

The product of its digits is 95551488, while the sum is 72.

The spelling of 18869896881 in words is "eighteen billion, eight hundred sixty-nine million, eight hundred ninety-six thousand, eight hundred eighty-one".