18940055055065 has 8 divisors (see below), whose sum is σ = 22732788319368. Its totient is φ = 15148895875200.

The previous prime is 18940055055037. The next prime is 18940055055071. The reversal of 18940055055065 is 56055055004981.

It can be written as a sum of positive squares in 4 ways, for example, as 7021355246656 + 11918699808409 = 2649784^2 + 3452347^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-18940055055065 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18940055054998 and 18940055055016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393494636 + ... + 393542765.

It is an arithmetic number, because the mean of its divisors is an integer number (2841598539921).

Almost surely, 2^{18940055055065} is an apocalyptic number.

It is an amenable number.

18940055055065 is a deficient number, since it is larger than the sum of its proper divisors (3792733264303).

18940055055065 is an equidigital number, since it uses as much as digits as its factorization.

18940055055065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787042219.

The product of its (nonzero) digits is 5400000, while the sum is 53.

The spelling of 18940055055065 in words is "eighteen trillion, nine hundred forty billion, fifty-five million, fifty-five thousand, sixty-five".