18868672168881 has 4 divisors (see below), whose sum is σ = 25158229558512. Its totient is φ = 12579114779252.

The previous prime is 18868672168861. The next prime is 18868672168939. The reversal of 18868672168881 is 18886127686881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18868672168881 - 2¹⁰ = 18868672167857 is a prime.

It is a super-2 number, since 2×18868672168881² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18868672168797 and 18868672168806.

It is not an unprimeable number, because it can be changed into a prime (18868672168861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3144778694811 + ... + 3144778694816.

It is an arithmetic number, because the mean of its divisors is an integer number (6289557389628).

Almost surely, 2^{18868672168881} is an apocalyptic number.

It is an amenable number.

18868672168881 is a deficient number, since it is larger than the sum of its proper divisors (6289557389631).

18868672168881 is an equidigital number, since it uses as much as digits as its factorization.

18868672168881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6289557389630.

The product of its digits is 792723456, while the sum is 78.

The spelling of 18868672168881 in words is "eighteen trillion, eight hundred sixty-eight billion, six hundred seventy-two million, one hundred sixty-eight thousand, eight hundred eighty-one".