19118390227 has 4 divisors (see below), whose sum is σ = 19131248736. Its totient is φ = 19105531720.

The previous prime is 19118390209. The next prime is 19118390231. The reversal of 19118390227 is 72209381191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72209381191 = 173 ⋅417395267.

It is a cyclic number.

It is not a de Polignac number, because 19118390227 - 2¹⁹ = 19117865939 is a prime.

It is a super-2 number, since 2×19118390227² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19118390827) 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, 6427024 + ... + 6429997.

It is an arithmetic number, because the mean of its divisors is an integer number (4782812184).

Almost surely, 2^19118390227 is an apocalyptic number.

19118390227 is a deficient number, since it is larger than the sum of its proper divisors (12858509).

19118390227 is a wasteful number, since it uses less digits than its factorization.

19118390227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12858508.

The product of its (nonzero) digits is 54432, while the sum is 43.

The spelling of 19118390227 in words is "nineteen billion, one hundred eighteen million, three hundred ninety thousand, two hundred twenty-seven".