1318105205 has 16 divisors (see below), whose sum is σ = 1634479104. Its totient is φ = 1019666880.

The previous prime is 1318105199. The next prime is 1318105207. The reversal of 1318105205 is 5025018131.

It is a happy number.

It is not a de Polignac number, because 1318105205 - 2¹⁸ = 1317843061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318105207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8300 + ... + 52010.

It is an arithmetic number, because the mean of its divisors is an integer number (102154944).

Almost surely, 2^1318105205 is an apocalyptic number.

It is an amenable number.

1318105205 is a deficient number, since it is larger than the sum of its proper divisors (316373899).

1318105205 is a wasteful number, since it uses less digits than its factorization.

1318105205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43916.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1318105205 is about 36305.7186266847. The cubic root of 1318105205 is about 1096.4361811592.

The spelling of 1318105205 in words is "one billion, three hundred eighteen million, one hundred five thousand, two hundred five".