1918304419 has 4 divisors (see below), whose sum is σ = 1954498896. Its totient is φ = 1882109944.

The previous prime is 1918304417. The next prime is 1918304447. The reversal of 1918304419 is 9144038191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1918304419 - 2¹ = 1918304417 is a prime.

It is a super-2 number, since 2×1918304419² = 7359783687909855122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1918304411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18097159 + ... + 18097264.

It is an arithmetic number, because the mean of its divisors is an integer number (488624724).

Almost surely, 2^1918304419 is an apocalyptic number.

1918304419 is a deficient number, since it is larger than the sum of its proper divisors (36194477).

1918304419 is an equidigital number, since it uses as much as digits as its factorization.

1918304419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36194476.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1918304419 is about 43798.4522443431. The cubic root of 1918304419 is about 1242.5270220984.

It can be divided in two parts, 191830 and 4419, that added together give a square (196249 = 443²).

The spelling of 1918304419 in words is "one billion, nine hundred eighteen million, three hundred four thousand, four hundred nineteen".