18356938589 has 8 divisors (see below), whose sum is σ = 21203736768. Its totient is φ = 15706471360.

The previous prime is 18356938573. The next prime is 18356938603. The reversal of 18356938589 is 98583965381.

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

It is not a de Polignac number, because 18356938589 - 2⁴ = 18356938573 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 (18356938529) 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, 49082537 + ... + 49082910.

It is an arithmetic number, because the mean of its divisors is an integer number (2650467096).

Almost surely, 2^18356938589 is an apocalyptic number.

It is an amenable number.

18356938589 is a deficient number, since it is larger than the sum of its proper divisors (2846798179).

18356938589 is a wasteful number, since it uses less digits than its factorization.

18356938589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98165475.

The product of its digits is 55987200, while the sum is 65.

The spelling of 18356938589 in words is "eighteen billion, three hundred fifty-six million, nine hundred thirty-eight thousand, five hundred eighty-nine".