4319440021 has 8 divisors (see below), whose sum is σ = 4657341024. Its totient is φ = 3982344240.

The previous prime is 4319440009. The next prime is 4319440039. The reversal of 4319440021 is 1200449134.

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 4319440021 - 2⁷ = 4319439893 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 (4319440001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190135 + ... + 211636.

It is an arithmetic number, because the mean of its divisors is an integer number (582167628).

Almost surely, 2^4319440021 is an apocalyptic number.

It is an amenable number.

4319440021 is a deficient number, since it is larger than the sum of its proper divisors (337901003).

4319440021 is a wasteful number, since it uses less digits than its factorization.

4319440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402611.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 4319440021 is about 65722.4468579800. The cubic root of 4319440021 is about 1628.5801957651.

Adding to 4319440021 its reverse (1200449134), we get a palindrome (5519889155).

The spelling of 4319440021 in words is "four billion, three hundred nineteen million, four hundred forty thousand, twenty-one".