2318791905 has 24 divisors (see below), whose sum is σ = 4041459240. Its totient is φ = 1229852160.

The previous prime is 2318791903. The next prime is 2318791907. The reversal of 2318791905 is 5091978132.

2318791905 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2318791903) and next prime (2318791907).

It can be written as a sum of positive squares in 4 ways, for example, as 13927824 + 2304864081 = 3732^2 + 48009^2 .

It is not a de Polignac number, because 2318791905 - 2¹ = 2318791903 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2318791903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134200 + ... + 150489.

It is an arithmetic number, because the mean of its divisors is an integer number (168394135).

Almost surely, 2^2318791905 is an apocalyptic number.

It is an amenable number.

2318791905 is a deficient number, since it is larger than the sum of its proper divisors (1722667335).

2318791905 is a wasteful number, since it uses less digits than its factorization.

2318791905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284881 (or 284878 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 2318791905 is about 48153.8358285194. The cubic root of 2318791905 is about 1323.5913649727.

The spelling of 2318791905 in words is "two billion, three hundred eighteen million, seven hundred ninety-one thousand, nine hundred five".