2118909284 has 12 divisors (see below), whose sum is σ = 3721479804. Its totient is φ = 1055629344.

The previous prime is 2118909283. The next prime is 2118909341. The reversal of 2118909284 is 4829098112.

It can be written as a sum of positive squares in 2 ways, for example, as 242113600 + 1876795684 = 15560^2 + 43322^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2118909283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 955079 + ... + 957294.

It is an arithmetic number, because the mean of its divisors is an integer number (310123317).

Almost surely, 2^2118909284 is an apocalyptic number.

It is an amenable number.

2118909284 is a deficient number, since it is larger than the sum of its proper divisors (1602570520).

2118909284 is a wasteful number, since it uses less digits than its factorization.

2118909284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912654 (or 1912652 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 2118909284 is about 46031.6117901600. The cubic root of 2118909284 is about 1284.4113104378.

The spelling of 2118909284 in words is "two billion, one hundred eighteen million, nine hundred nine thousand, two hundred eighty-four".