18309562849 has 8 divisors (see below), whose sum is σ = 18782991360. Its totient is φ = 17839628736.

The previous prime is 18309562837. The next prime is 18309562871. The reversal of 18309562849 is 94826590381.

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 18309562849 - 2¹³ = 18309554657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18309562849.

It is not an unprimeable number, because it can be changed into a prime (18309562889) 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, 862984 + ... + 883945.

It is an arithmetic number, because the mean of its divisors is an integer number (2347873920).

Almost surely, 2^18309562849 is an apocalyptic number.

It is an amenable number.

18309562849 is a deficient number, since it is larger than the sum of its proper divisors (473428511).

18309562849 is a wasteful number, since it uses less digits than its factorization.

18309562849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747199.

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 18309562849 in words is "eighteen billion, three hundred nine million, five hundred sixty-two thousand, eight hundred forty-nine".