9016806021 has 4 divisors (see below), whose sum is σ = 12022408032. Its totient is φ = 6011204012.

The previous prime is 9016805999. The next prime is 9016806023. The reversal of 9016806021 is 1206086109.

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: 1206086109 = 3 ⋅402028703.

It is a cyclic number.

It is not a de Polignac number, because 9016806021 - 2³¹ = 6869322373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9016806023) 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, 1502801001 + ... + 1502801006.

It is an arithmetic number, because the mean of its divisors is an integer number (3005602008).

Almost surely, 2^9016806021 is an apocalyptic number.

It is an amenable number.

9016806021 is a deficient number, since it is larger than the sum of its proper divisors (3005602011).

9016806021 is a wasteful number, since it uses less digits than its factorization.

9016806021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005602010.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 9016806021 is about 94956.8640015033. The cubic root of 9016806021 is about 2081.3777562208.

The spelling of 9016806021 in words is "nine billion, sixteen million, eight hundred six thousand, twenty-one".