18929342808 has 96 divisors (see below), whose sum is σ = 53059602960. Its totient is φ = 6092328960.

The previous prime is 18929342777. The next prime is 18929342813. The reversal of 18929342808 is 80824392981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253291 + ... + 319397.

Almost surely, 2^18929342808 is an apocalyptic number.

18929342808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18929342808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26529801480).

18929342808 is an abundant number, since it is smaller than the sum of its proper divisors (34130260152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18929342808 is a wasteful number, since it uses less digits than its factorization.

18929342808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66257 (or 66250 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 18929342808 in words is "eighteen billion, nine hundred twenty-nine million, three hundred forty-two thousand, eight hundred eight".