18885386867 has 4 divisors (see below), whose sum is σ = 18892672680. Its totient is φ = 18878101056.

The previous prime is 18885386801. The next prime is 18885386879. The reversal of 18885386867 is 76868358881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18885386867 - 2¹⁶ = 18885321331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18885386797 and 18885386806.

It is not an unprimeable number, because it can be changed into a prime (18885386567) 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, 3639017 + ... + 3644202.

It is an arithmetic number, because the mean of its divisors is an integer number (4723168170).

Almost surely, 2^18885386867 is an apocalyptic number.

18885386867 is a deficient number, since it is larger than the sum of its proper divisors (7285813).

18885386867 is an equidigital number, since it uses as much as digits as its factorization.

18885386867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7285812.

The product of its digits is 123863040, while the sum is 68.

The spelling of 18885386867 in words is "eighteen billion, eight hundred eighty-five million, three hundred eighty-six thousand, eight hundred sixty-seven".