19113507840 has 704 divisors, whose sum is σ = 74706001920. Its totient is φ = 4076666880.

The previous prime is 19113507769. The next prime is 19113507857. The reversal of 19113507840 is 4870531191.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 145904575 + ... + 145904705.

It is an arithmetic number, because the mean of its divisors is an integer number (106116480).

Almost surely, 2^19113507840 is an apocalyptic number.

19113507840 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 19113507840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37353000960).

19113507840 is an abundant number, since it is smaller than the sum of its proper divisors (55592494080).

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

19113507840 is a wasteful number, since it uses less digits than its factorization.

19113507840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 39.

The spelling of 19113507840 in words is "nineteen billion, one hundred thirteen million, five hundred seven thousand, eight hundred forty".