44001400021 has 16 divisors (see below), whose sum is σ = 46792468800. Its totient is φ = 41258678400.

The previous prime is 44001399997. The next prime is 44001400043. The reversal of 44001400021 is 12000410044.

It is a cyclic number.

It is not a de Polignac number, because 44001400021 - 2¹⁵ = 44001367253 is a prime.

It is a super-2 number, since 2×44001400021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 44001399968 and 44001400004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44001400061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2000001 + ... + 2021881.

It is an arithmetic number, because the mean of its divisors is an integer number (2924529300).

Almost surely, 2^44001400021 is an apocalyptic number.

It is an amenable number.

44001400021 is a deficient number, since it is larger than the sum of its proper divisors (2791068779).

44001400021 is a wasteful number, since it uses less digits than its factorization.

44001400021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22980.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 44001400021 its reverse (12000410044), we get a palindrome (56001810065).

The spelling of 44001400021 in words is "forty-four billion, one million, four hundred thousand, twenty-one".