18929316289 has 16 divisors (see below), whose sum is σ = 20451574080. Its totient is φ = 17416607040.

The previous prime is 18929316277. The next prime is 18929316311. The reversal of 18929316289 is 98261392981.

It is a cyclic number.

It is not a de Polignac number, because 18929316289 - 2⁹ = 18929315777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18929316229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8341447 + ... + 8343715.

It is an arithmetic number, because the mean of its divisors is an integer number (1278223380).

Almost surely, 2^18929316289 is an apocalyptic number.

It is an amenable number.

18929316289 is a deficient number, since it is larger than the sum of its proper divisors (1522257791).

18929316289 is a wasteful number, since it uses less digits than its factorization.

18929316289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080.

The product of its digits is 3359232, while the sum is 58.

The spelling of 18929316289 in words is "eighteen billion, nine hundred twenty-nine million, three hundred sixteen thousand, two hundred eighty-nine".