9909818533 has 4 divisors (see below), whose sum is σ = 9910517440. Its totient is φ = 9909119628.

The previous prime is 9909818519. The next prime is 9909818537. The reversal of 9909818533 is 3358189099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3358189099 = 491 ⋅6839489.

It is a cyclic number.

It is not a de Polignac number, because 9909818533 - 2⁹ = 9909818021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9909818537) 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, 327735 + ... + 356692.

It is an arithmetic number, because the mean of its divisors is an integer number (2477629360).

Almost surely, 2^9909818533 is an apocalyptic number.

It is an amenable number.

9909818533 is a deficient number, since it is larger than the sum of its proper divisors (698907).

9909818533 is a wasteful number, since it uses less digits than its factorization.

9909818533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698906.

The product of its (nonzero) digits is 2099520, while the sum is 55.

The square root of 9909818533 is about 99548.0714680099. The cubic root of 9909818533 is about 2147.9387876915.

The spelling of 9909818533 in words is "nine billion, nine hundred nine million, eight hundred eighteen thousand, five hundred thirty-three".