18485941389 has 16 divisors (see below), whose sum is σ = 26101559232. Its totient is φ = 11597351168.

The previous prime is 18485941367. The next prime is 18485941427. The reversal of 18485941389 is 98314958481.

It is a cyclic number.

It is not a de Polignac number, because 18485941389 - 2⁷ = 18485941261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18485941289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398407 + ... + 442379.

It is an arithmetic number, because the mean of its divisors is an integer number (1631347452).

Almost surely, 2^18485941389 is an apocalyptic number.

It is an amenable number.

18485941389 is a deficient number, since it is larger than the sum of its proper divisors (7615617843).

18485941389 is a wasteful number, since it uses less digits than its factorization.

18485941389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52236.

The product of its digits is 9953280, while the sum is 60.

The spelling of 18485941389 in words is "eighteen billion, four hundred eighty-five million, nine hundred forty-one thousand, three hundred eighty-nine".