9044002021 has 4 divisors (see below), whose sum is σ = 9066556044. Its totient is φ = 9021448000.

The previous prime is 9044002013. The next prime is 9044002027. The reversal of 9044002021 is 1202004409.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7784532900 + 1259469121 = 88230^2 + 35489^2 .

It is a cyclic number.

It is not a de Polignac number, because 9044002021 - 2³ = 9044002013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9044001983 and 9044002001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9044002027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11276410 + ... + 11277211.

It is an arithmetic number, because the mean of its divisors is an integer number (2266639011).

Almost surely, 2^9044002021 is an apocalyptic number.

It is an amenable number.

9044002021 is a deficient number, since it is larger than the sum of its proper divisors (22554023).

9044002021 is a wasteful number, since it uses less digits than its factorization.

9044002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22554022.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 9044002021 is about 95099.9580494124. The cubic root of 9044002021 is about 2083.4682353662.

The spelling of 9044002021 in words is "nine billion, forty-four million, two thousand, twenty-one".