19438365379 has 4 divisors (see below), whose sum is σ = 19458892584. Its totient is φ = 19417838176.

The previous prime is 19438365371. The next prime is 19438365409. The reversal of 19438365379 is 97356383491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97356383491 = 3121 ⋅31193971.

It is a cyclic number.

It is not a de Polignac number, because 19438365379 - 2³ = 19438365371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19438365371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10262182 + ... + 10264075.

It is an arithmetic number, because the mean of its divisors is an integer number (4864723146).

Almost surely, 2^19438365379 is an apocalyptic number.

19438365379 is a deficient number, since it is larger than the sum of its proper divisors (20527205).

19438365379 is an equidigital number, since it uses as much as digits as its factorization.

19438365379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20527204.

The product of its digits is 14696640, while the sum is 58.

The spelling of 19438365379 in words is "nineteen billion, four hundred thirty-eight million, three hundred sixty-five thousand, three hundred seventy-nine".