19163559940 has 72 divisors (see below), whose sum is σ = 47268591552. Its totient is φ = 6506539200.

The previous prime is 19163559929. The next prime is 19163559953. The reversal of 19163559940 is 4995536191.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6015 + ... + 195865.

It is an arithmetic number, because the mean of its divisors is an integer number (656508216).

Almost surely, 2^19163559940 is an apocalyptic number.

19163559940 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 19163559940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23634295776).

19163559940 is an abundant number, since it is smaller than the sum of its proper divisors (28105031612).

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

19163559940 is a wasteful number, since it uses less digits than its factorization.

19163559940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189977 (or 189968 counting only the distinct ones).

The product of its (nonzero) digits is 1312200, while the sum is 52.

The spelling of 19163559940 in words is "nineteen billion, one hundred sixty-three million, five hundred fifty-nine thousand, nine hundred forty".