18795939840 has 960 divisors, whose sum is σ = 75346951680. Its totient is φ = 4459069440.

The previous prime is 18795939839. The next prime is 18795939887. The reversal of 18795939840 is 4893959781.

It is a tau number, because it is divible by the number of its divisors (960).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 437114859 + ... + 437114901.

It is an arithmetic number, because the mean of its divisors is an integer number (78486408).

Almost surely, 2^18795939840 is an apocalyptic number.

18795939840 is a gapful number since it is divisible by the number (10) 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 18795939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37673475840).

18795939840 is an abundant number, since it is smaller than the sum of its proper divisors (56551011840).

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

18795939840 is a wasteful number, since it uses less digits than its factorization.

18795939840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 18795939840 in words is "eighteen billion, seven hundred ninety-five million, nine hundred thirty-nine thousand, eight hundred forty".