19338008887 has 4 divisors (see below), whose sum is σ = 19338531376. Its totient is φ = 19337486400.

The previous prime is 19338008881. The next prime is 19338008903. The reversal of 19338008887 is 78880083391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78880083391 = 491 ⋅160651901.

It is a cyclic number.

It is not a de Polignac number, because 19338008887 - 2¹¹ = 19338006839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19338008881) 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, 201114 + ... + 281287.

It is an arithmetic number, because the mean of its divisors is an integer number (4834632844).

Almost surely, 2^19338008887 is an apocalyptic number.

19338008887 is a deficient number, since it is larger than the sum of its proper divisors (522489).

19338008887 is an equidigital number, since it uses as much as digits as its factorization.

19338008887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522488.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 19338008887 in words is "nineteen billion, three hundred thirty-eight million, eight thousand, eight hundred eighty-seven".