1918016105 has 4 divisors (see below), whose sum is σ = 2301619332. Its totient is φ = 1534412880.

The previous prime is 1918016077. The next prime is 1918016117. The reversal of 1918016105 is 5016108191.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1392185344 + 525830761 = 37312^2 + 22931^2 .

It is not a de Polignac number, because 1918016105 - 2²⁶ = 1850907241 is a prime.

It is a Duffinian 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, 191801606 + ... + 191801615.

It is an arithmetic number, because the mean of its divisors is an integer number (575404833).

Almost surely, 2^1918016105 is an apocalyptic number.

It is an amenable number.

1918016105 is a deficient number, since it is larger than the sum of its proper divisors (383603227).

1918016105 is an equidigital number, since it uses as much as digits as its factorization.

1918016105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383603226.

The product of its (nonzero) digits is 2160, while the sum is 32.

The square root of 1918016105 is about 43795.1607486489. The cubic root of 1918016105 is about 1242.4647699204.

The spelling of 1918016105 in words is "one billion, nine hundred eighteen million, sixteen thousand, one hundred five".