18073311887 has 8 divisors (see below), whose sum is σ = 18872248320. Its totient is φ = 17275470520.

The previous prime is 18073311863. The next prime is 18073311889. The reversal of 18073311887 is 78811337081.

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 18073311887 - 2⁸ = 18073311631 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 (18073311889) 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, 239939 + ... + 306132.

It is an arithmetic number, because the mean of its divisors is an integer number (2359031040).

Almost surely, 2^18073311887 is an apocalyptic number.

18073311887 is a deficient number, since it is larger than the sum of its proper divisors (798936433).

18073311887 is a wasteful number, since it uses less digits than its factorization.

18073311887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547533.

The product of its (nonzero) digits is 225792, while the sum is 47.

The spelling of 18073311887 in words is "eighteen billion, seventy-three million, three hundred eleven thousand, eight hundred eighty-seven".