18681868655 has 8 divisors (see below), whose sum is σ = 23598150000. Its totient is φ = 14158889856.

The previous prime is 18681868637. The next prime is 18681868661. The reversal of 18681868655 is 55686818681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18681868655 - 2¹⁸ = 18681606511 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98325530 + ... + 98325719.

It is an arithmetic number, because the mean of its divisors is an integer number (2949768750).

Almost surely, 2^18681868655 is an apocalyptic number.

18681868655 is a deficient number, since it is larger than the sum of its proper divisors (4916281345).

18681868655 is a wasteful number, since it uses less digits than its factorization.

18681868655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196651273.

The product of its digits is 22118400, while the sum is 62.

The spelling of 18681868655 in words is "eighteen billion, six hundred eighty-one million, eight hundred sixty-eight thousand, six hundred fifty-five".