44445443021 has 16 divisors (see below), whose sum is σ = 51243443328. Its totient is φ = 37760299200.

The previous prime is 44445442999. The next prime is 44445443027. The reversal of 44445443021 is 12034454444.

It is a cyclic number.

It is not a de Polignac number, because 44445443021 - 2²⁶ = 44378334157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44445443027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 753791 + ... + 810611.

It is an arithmetic number, because the mean of its divisors is an integer number (3202715208).

Almost surely, 2^44445443021 is an apocalyptic number.

It is an amenable number.

44445443021 is a deficient number, since it is larger than the sum of its proper divisors (6798000307).

44445443021 is a wasteful number, since it uses less digits than its factorization.

44445443021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57812.

The product of its (nonzero) digits is 122880, while the sum is 35.

Adding to 44445443021 its reverse (12034454444), we get a palindrome (56479897465).

The spelling of 44445443021 in words is "forty-four billion, four hundred forty-five million, four hundred forty-three thousand, twenty-one".