18867876881 has 16 divisors (see below), whose sum is σ = 21979586304. Its totient is φ = 15860505024.

The previous prime is 18867876817. The next prime is 18867876889.

18867876881 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18867876881 - 2⁶ = 18867876817 is a prime.

It is a super-2 number, since 2×18867876881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18867876889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 972431 + ... + 991643.

It is an arithmetic number, because the mean of its divisors is an integer number (1373724144).

Almost surely, 2^18867876881 is an apocalyptic number.

It is an amenable number.

18867876881 is a deficient number, since it is larger than the sum of its proper divisors (3111709423).

18867876881 is a wasteful number, since it uses less digits than its factorization.

18867876881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21920.

The product of its digits is 57802752, while the sum is 68.

The spelling of 18867876881 in words is "eighteen billion, eight hundred sixty-seven million, eight hundred seventy-six thousand, eight hundred eighty-one".