18681773137 has 8 divisors (see below), whose sum is σ = 18716688576. Its totient is φ = 18646890672.

The previous prime is 18681773087. The next prime is 18681773141. The reversal of 18681773137 is 73137718681.

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 18681773137 - 2¹⁹ = 18681248849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18681773837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1317238 + ... + 1331344.

It is an arithmetic number, because the mean of its divisors is an integer number (2339586072).

Almost surely, 2^18681773137 is an apocalyptic number.

It is an amenable number.

18681773137 is a deficient number, since it is larger than the sum of its proper divisors (34915439).

18681773137 is a wasteful number, since it uses less digits than its factorization.

18681773137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16487.

The product of its digits is 1185408, while the sum is 52.

The spelling of 18681773137 in words is "eighteen billion, six hundred eighty-one million, seven hundred seventy-three thousand, one hundred thirty-seven".