18519926908 has 48 divisors (see below), whose sum is σ = 37884672000. Its totient is φ = 7918443120.

The previous prime is 18519926863. The next prime is 18519926923. The reversal of 18519926908 is 80962991581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575673 + ... + 606991.

It is an arithmetic number, because the mean of its divisors is an integer number (789264000).

Almost surely, 2^18519926908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18519926908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18942336000).

18519926908 is an abundant number, since it is smaller than the sum of its proper divisors (19364745092).

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

18519926908 is a wasteful number, since it uses less digits than its factorization.

18519926908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31775 (or 31759 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 58.

The spelling of 18519926908 in words is "eighteen billion, five hundred nineteen million, nine hundred twenty-six thousand, nine hundred eight".