18718461729 has 12 divisors (see below), whose sum is σ = 29495758032. Its totient is φ = 11344522200.

The previous prime is 18718461691. The next prime is 18718461731. The reversal of 18718461729 is 92716481781.

18718461729 is a `hidden beast` number, since 1 + 8 + 7 + 18 + 4 + 617 + 2 + 9 = 666.

It is not a de Polignac number, because 18718461729 - 2¹¹ = 18718459681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18718461029) 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 11 ways as a sum of consecutive naturals, for example, 94537587 + ... + 94537784.

It is an arithmetic number, because the mean of its divisors is an integer number (2457979836).

Almost surely, 2^18718461729 is an apocalyptic number.

It is an amenable number.

18718461729 is a deficient number, since it is larger than the sum of its proper divisors (10777296303).

18718461729 is a wasteful number, since it uses less digits than its factorization.

18718461729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189075388 (or 189075385 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The spelling of 18718461729 in words is "eighteen billion, seven hundred eighteen million, four hundred sixty-one thousand, seven hundred twenty-nine".