18739107816 has 256 divisors, whose sum is σ = 56905390080. Its totient is φ = 5066880000.

The previous prime is 18739107809. The next prime is 18739107817. The reversal of 18739107816 is 61870193781.

It is not an unprimeable number, because it can be changed into a prime (18739107817) 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 63 ways as a sum of consecutive naturals, for example, 12913891 + ... + 12915341.

It is an arithmetic number, because the mean of its divisors is an integer number (222286680).

Almost surely, 2^18739107816 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 18739107816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28452695040).

18739107816 is an abundant number, since it is smaller than the sum of its proper divisors (38166282264).

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

18739107816 is a wasteful number, since it uses less digits than its factorization.

18739107816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608 (or 1604 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 51.

The spelling of 18739107816 in words is "eighteen billion, seven hundred thirty-nine million, one hundred seven thousand, eight hundred sixteen".