18686868367 has 4 divisors (see below), whose sum is σ = 19786095936. Its totient is φ = 17587640800.

The previous prime is 18686868311. The next prime is 18686868373. The reversal of 18686868367 is 76386868681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76386868681 = 7541 ⋅10129541.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18686868367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18686868307) 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, 549613759 + ... + 549613792.

It is an arithmetic number, because the mean of its divisors is an integer number (4946523984).

Almost surely, 2^18686868367 is an apocalyptic number.

18686868367 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18686868367 is a deficient number, since it is larger than the sum of its proper divisors (1099227569).

18686868367 is a wasteful number, since it uses less digits than its factorization.

18686868367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099227568.

The product of its digits is 111476736, while the sum is 67.

The spelling of 18686868367 in words is "eighteen billion, six hundred eighty-six million, eight hundred sixty-eight thousand, three hundred sixty-seven".