18036320489 has 8 divisors (see below), whose sum is σ = 19677677760. Its totient is φ = 16395245200.

The previous prime is 18036320483. The next prime is 18036320539. The reversal of 18036320489 is 98402363081.

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 18036320489 - 2²⁰ = 18035271913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18036320483) 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, 76607 + ... + 204795.

It is an arithmetic number, because the mean of its divisors is an integer number (2459709720).

Almost surely, 2^18036320489 is an apocalyptic number.

It is an amenable number.

18036320489 is a deficient number, since it is larger than the sum of its proper divisors (1641357271).

18036320489 is a wasteful number, since it uses less digits than its factorization.

18036320489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140991.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 18036320489 in words is "eighteen billion, thirty-six million, three hundred twenty thousand, four hundred eighty-nine".