1019930723868 has 144 divisors (see below), whose sum is σ = 2820234654720. Its totient is φ = 285995009664.

The previous prime is 1019930723849. The next prime is 1019930723881. The reversal of 1019930723868 is 8683270399101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7691746 + ... + 7823222.

It is an arithmetic number, because the mean of its divisors is an integer number (19584962880).

Almost surely, 2^{1019930723868} 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 1019930723868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1410117327360).

1019930723868 is an abundant number, since it is smaller than the sum of its proper divisors (1800303930852).

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

1019930723868 is a wasteful number, since it uses less digits than its factorization.

1019930723868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131744 (or 131735 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 57.

The spelling of 1019930723868 in words is "one trillion, nineteen billion, nine hundred thirty million, seven hundred twenty-three thousand, eight hundred sixty-eight".