9918943371 has 12 divisors (see below), whose sum is σ = 14858006072. Its totient is φ = 6612628752.

The previous prime is 9918943339. The next prime is 9918943373. The reversal of 9918943371 is 1733498199.

It is a happy number.

9918943371 is a `hidden beast` number, since 99 + 189 + 4 + 3 + 371 = 666.

It is not a de Polignac number, because 9918943371 - 2⁵ = 9918943339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9918943373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20409106 + ... + 20409591.

Almost surely, 2^9918943371 is an apocalyptic number.

9918943371 is a deficient number, since it is larger than the sum of its proper divisors (4939062701).

9918943371 is an equidigital number, since it uses as much as digits as its factorization.

9918943371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40818712 (or 40818700 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 9918943371 is about 99593.8922374259. The cubic root of 9918943371 is about 2148.5978505793.

The spelling of 9918943371 in words is "nine billion, nine hundred eighteen million, nine hundred forty-three thousand, three hundred seventy-one".