9036442021 has 32 divisors (see below), whose sum is σ = 10082867040. Its totient is φ = 8059355136.

The previous prime is 9036442013. The next prime is 9036442043. The reversal of 9036442021 is 1202446309.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 1343222500 + 7693219521 = 36650^2 + 87711^2 .

It is a cyclic number.

It is not a de Polignac number, because 9036442021 - 2³ = 9036442013 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 (9036442081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9248685 + ... + 9249661.

It is an arithmetic number, because the mean of its divisors is an integer number (315089595).

Almost surely, 2^9036442021 is an apocalyptic number.

It is an amenable number.

9036442021 is a deficient number, since it is larger than the sum of its proper divisors (1046425019).

9036442021 is a wasteful number, since it uses less digits than its factorization.

9036442021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 9036442021 is about 95060.2020879400. The cubic root of 9036442021 is about 2082.8875407176.

The spelling of 9036442021 in words is "nine billion, thirty-six million, four hundred forty-two thousand, twenty-one".