19139509376 has 128 divisors (see below), whose sum is σ = 42092870400. Its totient is φ = 8614453248.

The previous prime is 19139509339. The next prime is 19139509397. The reversal of 19139509376 is 67390593191.

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

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

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, 13449401 + ... + 13450823.

It is an arithmetic number, because the mean of its divisors is an integer number (328850550).

Almost surely, 2^19139509376 is an apocalyptic number.

19139509376 is a gapful number since it is divisible by the number (16) 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 19139509376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21046435200).

19139509376 is an abundant number, since it is smaller than the sum of its proper divisors (22953361024).

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

19139509376 is a wasteful number, since it uses less digits than its factorization.

19139509376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 1377810, while the sum is 53.

The spelling of 19139509376 in words is "nineteen billion, one hundred thirty-nine million, five hundred nine thousand, three hundred seventy-six".