19108047840 has 576 divisors, whose sum is σ = 73470136320. Its totient is φ = 4157153280.

The previous prime is 19108047839. The next prime is 19108047869. The reversal of 19108047840 is 4874080191.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 19108047792 and 19108047801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 53225581 + ... + 53225939.

It is an arithmetic number, because the mean of its divisors is an integer number (127552320).

Almost surely, 2^19108047840 is an apocalyptic number.

19108047840 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 19108047840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36735068160).

19108047840 is an abundant number, since it is smaller than the sum of its proper divisors (54362088480).

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

19108047840 is a wasteful number, since it uses less digits than its factorization.

19108047840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The spelling of 19108047840 in words is "nineteen billion, one hundred eight million, forty-seven thousand, eight hundred forty".