19398036040 has 64 divisors (see below), whose sum is σ = 45032371200. Its totient is φ = 7516384512.

The previous prime is 19398036019. The next prime is 19398036059. The reversal of 19398036040 is 4063089391.

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, 109569 + ... + 225391.

It is an arithmetic number, because the mean of its divisors is an integer number (703630800).

Almost surely, 2^19398036040 is an apocalyptic number.

19398036040 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 19398036040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22516185600).

19398036040 is an abundant number, since it is smaller than the sum of its proper divisors (25634335160).

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

19398036040 is a wasteful number, since it uses less digits than its factorization.

19398036040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115966 (or 115962 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 19398036040 in words is "nineteen billion, three hundred ninety-eight million, thirty-six thousand, forty".