1868118919 has 4 divisors (see below), whose sum is σ = 1878440200. Its totient is φ = 1857797640.

The previous prime is 1868118887. The next prime is 1868118929. The reversal of 1868118919 is 9198118681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9198118681 = 83 ⋅110820707.

It is a cyclic number.

It is not a de Polignac number, because 1868118919 - 2⁵ = 1868118887 is a prime.

It is a super-2 number, since 2×1868118919² = 6979736591051457122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868118929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5160369 + ... + 5160730.

It is an arithmetic number, because the mean of its divisors is an integer number (469610050).

Almost surely, 2^1868118919 is an apocalyptic number.

1868118919 is a deficient number, since it is larger than the sum of its proper divisors (10321281).

1868118919 is a wasteful number, since it uses less digits than its factorization.

1868118919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10321280.

The product of its digits is 248832, while the sum is 52.

The square root of 1868118919 is about 43221.7412768158. The cubic root of 1868118919 is about 1231.5957254156.

The spelling of 1868118919 in words is "one billion, eight hundred sixty-eight million, one hundred eighteen thousand, nine hundred nineteen".