19132139440 has 40 divisors (see below), whose sum is σ = 45146150640. Its totient is φ = 7538631936.

The previous prime is 19132139437. The next prime is 19132139501. The reversal of 19132139440 is 4493123191.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 19132139440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1779355 + ... + 1790074.

It is an arithmetic number, because the mean of its divisors is an integer number (1128653766).

Almost surely, 2^19132139440 is an apocalyptic number.

19132139440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19132139440 is an abundant number, since it is smaller than the sum of its proper divisors (26014011200).

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

19132139440 is a wasteful number, since it uses less digits than its factorization.

19132139440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3569509 (or 3569503 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 19132139440 in words is "nineteen billion, one hundred thirty-two million, one hundred thirty-nine thousand, four hundred forty".