18718718714473 has 4 divisors (see below), whose sum is σ = 18816722477568. Its totient is φ = 18620714951380.

The previous prime is 18718718714461. The next prime is 18718718714483. The reversal of 18718718714473 is 37441781781781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18718718714473 - 2²⁹ = 18718181843561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18718718714399 and 18718718714408.

It is not an unprimeable number, because it can be changed into a prime (18718718714413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49001881261 + ... + 49001881642.

It is an arithmetic number, because the mean of its divisors is an integer number (4704180619392).

Almost surely, 2^{18718718714473} is an apocalyptic number.

It is an amenable number.

18718718714473 is a deficient number, since it is larger than the sum of its proper divisors (98003763095).

18718718714473 is an equidigital number, since it uses as much as digits as its factorization.

18718718714473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98003763094.

The product of its digits is 59006976, while the sum is 67.

The spelling of 18718718714473 in words is "eighteen trillion, seven hundred eighteen billion, seven hundred eighteen million, seven hundred fourteen thousand, four hundred seventy-three".