18439247069 has 8 divisors (see below), whose sum is σ = 18577257600. Its totient is φ = 18301446000.

The previous prime is 18439247027. The next prime is 18439247207. The reversal of 18439247069 is 96074293481.

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 18439247069 - 2¹² = 18439242973 is a prime.

It is a super-2 number, since 2×18439247069² (a number of 21 digits) contains 22 as substring.

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 18439247069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18439247569) 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, 126632 + ... + 230030.

It is an arithmetic number, because the mean of its divisors is an integer number (2322157200).

Almost surely, 2^18439247069 is an apocalyptic number.

It is an amenable number.

18439247069 is a deficient number, since it is larger than the sum of its proper divisors (138010531).

18439247069 is a wasteful number, since it uses less digits than its factorization.

18439247069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104731.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 18439247069 in words is "eighteen billion, four hundred thirty-nine million, two hundred forty-seven thousand, sixty-nine".