19313985800 has 108 divisors (see below), whose sum is σ = 46547128215. Its totient is φ = 7452796800.

The previous prime is 19313985797. The next prime is 19313985809. The reversal of 19313985800 is 858931391.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 181010116 + 19132975684 = 13454^2 + 138322^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=98270.

It is not an unprimeable number, because it can be changed into a prime (19313985809) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 60927242 + ... + 60927558.

Almost surely, 2^19313985800 is an apocalyptic number.

19313985800 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 19313985800

19313985800 is an abundant number, since it is smaller than the sum of its proper divisors (27233142415).

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

19313985800 is an equidigital number, since it uses as much as digits as its factorization.

19313985800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 47.

The spelling of 19313985800 in words is "nineteen billion, three hundred thirteen million, nine hundred eighty-five thousand, eight hundred".