9917422120 has 32 divisors (see below), whose sum is σ = 22463973000. Its totient is φ = 3940342528.

The previous prime is 9917422093. The next prime is 9917422121. The reversal of 9917422120 is 212247199.

It can be written as a sum of positive squares in 4 ways, for example, as 8638215364 + 1279206756 = 92942^2 + 35766^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9917422120.

It is not an unprimeable number, because it can be changed into a prime (9917422121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 826039 + ... + 837958.

Almost surely, 2^9917422120 is an apocalyptic number.

It is an amenable number.

9917422120 is an abundant number, since it is smaller than the sum of its proper divisors (12546550880).

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

9917422120 is a wasteful number, since it uses less digits than its factorization.

9917422120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664157 (or 1664153 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 9917422120 is about 99586.2546740262. The cubic root of 9917422120 is about 2148.4880027316.

The spelling of 9917422120 in words is "nine billion, nine hundred seventeen million, four hundred twenty-two thousand, one hundred twenty".