4021444420394 has 8 divisors (see below), whose sum is σ = 6046494818628. Its totient is φ = 2005946147520.

The previous prime is 4021444420393. The next prime is 4021444420403. The reversal of 4021444420394 is 4930244441204.

It can be written as a sum of positive squares in 2 ways, for example, as 3653889595225 + 367554825169 = 1911515^2 + 606263^2 .

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

It is not an unprimeable number, because it can be changed into a prime (4021444420393) 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, 2388030287 + ... + 2388031970.

Almost surely, 2^{4021444420394} is an apocalyptic number.

4021444420394 is a deficient number, since it is larger than the sum of its proper divisors (2025050398234).

4021444420394 is a wasteful number, since it uses less digits than its factorization.

4021444420394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4776062680.

The product of its (nonzero) digits is 442368, while the sum is 41.

Adding to 4021444420394 its reverse (4930244441204), we get a palindrome (8951688861598).

The spelling of 4021444420394 in words is "four trillion, twenty-one billion, four hundred forty-four million, four hundred twenty thousand, three hundred ninety-four".