4444623021 has 16 divisors (see below), whose sum is σ = 6299195904. Its totient is φ = 2777923584.

The previous prime is 4444622993. The next prime is 4444623037. The reversal of 4444623021 is 1203264444.

It is not a de Polignac number, because 4444623021 - 2⁹ = 4444622509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4444623021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4444623221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156445 + ... + 182658.

It is an arithmetic number, because the mean of its divisors is an integer number (393699744).

Almost surely, 2^4444623021 is an apocalyptic number.

It is an amenable number.

4444623021 is a deficient number, since it is larger than the sum of its proper divisors (1854572883).

4444623021 is a wasteful number, since it uses less digits than its factorization.

4444623021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339380.

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 4444623021 is about 66668.0059773802. The cubic root of 4444623021 is about 1644.1634029749.

Adding to 4444623021 its reverse (1203264444), we get a palindrome (5647887465).

The spelling of 4444623021 in words is "four billion, four hundred forty-four million, six hundred twenty-three thousand, twenty-one".