2118947922 has 48 divisors (see below), whose sum is σ = 5650532160. Its totient is φ = 558842976.

The previous prime is 2118947921. The next prime is 2118947939. The reversal of 2118947922 is 2297498112.

It is a super-2 number, since 2×2118947922² = 8979880592296236168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2118947921) 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, 645172 + ... + 648447.

It is an arithmetic number, because the mean of its divisors is an integer number (117719420).

Almost surely, 2^2118947922 is an apocalyptic number.

2118947922 is an abundant number, since it is smaller than the sum of its proper divisors (3531584238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2118947922 is a wasteful number, since it uses less digits than its factorization.

2118947922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293647 (or 1293644 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 2118947922 is about 46032.0314780914. The cubic root of 2118947922 is about 1284.4191174076.

The spelling of 2118947922 in words is "two billion, one hundred eighteen million, nine hundred forty-seven thousand, nine hundred twenty-two".