42444202021 has 8 divisors (see below), whose sum is σ = 46180370264. Its totient is φ = 38775352320.

The previous prime is 42444201983. The next prime is 42444202069. The reversal of 42444202021 is 12020244424.

It can be written as a sum of positive squares in 4 ways, for example, as 390497121 + 42053704900 = 19761^2 + 205070^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42444202021 - 2¹³ = 42444193829 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 (42444202091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16828320 + ... + 16830841.

It is an arithmetic number, because the mean of its divisors is an integer number (5772546283).

Almost surely, 2^42444202021 is an apocalyptic number.

It is an amenable number.

42444202021 is a deficient number, since it is larger than the sum of its proper divisors (3736168243).

42444202021 is a wasteful number, since it uses less digits than its factorization.

42444202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33659271.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 42444202021 its reverse (12020244424), we get a palindrome (54464446445).

The spelling of 42444202021 in words is "forty-two billion, four hundred forty-four million, two hundred two thousand, twenty-one".