18734615440013 has 8 divisors (see below), whose sum is σ = 20437911887520. Its totient is φ = 17031343924080.

The previous prime is 18734615439949. The next prime is 18734615440061. The reversal of 18734615440013 is 31004451643781.

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 18734615440013 - 2⁶ = 18734615439949 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 18734615440013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18734615440213) 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, 4644083 + ... + 7683536.

It is an arithmetic number, because the mean of its divisors is an integer number (2554738985940).

Almost surely, 2^{18734615440013} is an apocalyptic number.

It is an amenable number.

18734615440013 is a deficient number, since it is larger than the sum of its proper divisors (1703296447507).

18734615440013 is a wasteful number, since it uses less digits than its factorization.

18734615440013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12465787.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 18734615440013 in words is "eighteen trillion, seven hundred thirty-four billion, six hundred fifteen million, four hundred forty thousand, thirteen".