19387423318 has 8 divisors (see below), whose sum is σ = 29867111712. Its totient is φ = 9431719416.

The previous prime is 19387423301. The next prime is 19387423351. The reversal of 19387423318 is 81332478391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×19387423318² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130996030 + ... + 130996177.

It is an arithmetic number, because the mean of its divisors is an integer number (3733388964).

Almost surely, 2^19387423318 is an apocalyptic number.

19387423318 is a deficient number, since it is larger than the sum of its proper divisors (10479688394).

19387423318 is a wasteful number, since it uses less digits than its factorization.

19387423318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261992246.

The product of its digits is 870912, while the sum is 49.

The spelling of 19387423318 in words is "nineteen billion, three hundred eighty-seven million, four hundred twenty-three thousand, three hundred eighteen".