19138896379 has 16 divisors (see below), whose sum is σ = 19531643040. Its totient is φ = 18750631680.

The previous prime is 19138896373. The next prime is 19138896397. The reversal of 19138896379 is 97369883191.

It is a cyclic number.

It is not a de Polignac number, because 19138896379 - 2²³ = 19130507771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19138896379.

It is not an unprimeable number, because it can be changed into a prime (19138896373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5962527 + ... + 5965735.

It is an arithmetic number, because the mean of its divisors is an integer number (1220727690).

Almost surely, 2^19138896379 is an apocalyptic number.

19138896379 is a deficient number, since it is larger than the sum of its proper divisors (392746661).

19138896379 is a wasteful number, since it uses less digits than its factorization.

19138896379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870.

The product of its digits is 17635968, while the sum is 64.

The spelling of 19138896379 in words is "nineteen billion, one hundred thirty-eight million, eight hundred ninety-six thousand, three hundred seventy-nine".