18718929506 has 16 divisors (see below), whose sum is σ = 28757249664. Its totient is φ = 9133571664.

The previous prime is 18718929499. The next prime is 18718929511. The reversal of 18718929506 is 60592981781.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1370 + ... + 193493.

It is an arithmetic number, because the mean of its divisors is an integer number (1797328104).

Almost surely, 2^18718929506 is an apocalyptic number.

18718929506 is a deficient number, since it is larger than the sum of its proper divisors (10038320158).

18718929506 is a wasteful number, since it uses less digits than its factorization.

18718929506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196025.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 18718929506 in words is "eighteen billion, seven hundred eighteen million, nine hundred twenty-nine thousand, five hundred six".