10044440021 has 24 divisors (see below), whose sum is σ = 13360052160. Its totient is φ = 7366423680.

The previous prime is 10044439943. The next prime is 10044440059. The reversal of 10044440021 is 12004444001.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-10044440021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10044439975 and 10044440002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10044440071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 334391 + ... + 363188.

It is an arithmetic number, because the mean of its divisors is an integer number (556668840).

Almost surely, 2^10044440021 is an apocalyptic number.

10044440021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10044440021 is a deficient number, since it is larger than the sum of its proper divisors (3315612139).

10044440021 is a wasteful number, since it uses less digits than its factorization.

10044440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697625 (or 697614 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 10044440021 its reverse (12004444001), we get a palindrome (22048884022).

The spelling of 10044440021 in words is "ten billion, forty-four million, four hundred forty thousand, twenty-one".