19140436608 has 128 divisors (see below), whose sum is σ = 53291589120. Its totient is φ = 6075227136.

The previous prime is 19140436583. The next prime is 19140436621. The reversal of 19140436608 is 80663404191.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 19140436608.

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, 2000091 + ... + 2009637.

It is an arithmetic number, because the mean of its divisors is an integer number (416340540).

Almost surely, 2^19140436608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19140436608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26645794560).

19140436608 is an abundant number, since it is smaller than the sum of its proper divisors (34151152512).

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

19140436608 is a wasteful number, since it uses less digits than its factorization.

19140436608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9814 (or 9802 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 19140436608 in words is "nineteen billion, one hundred forty million, four hundred thirty-six thousand, six hundred eight".