21444014001425 has 24 divisors (see below), whose sum is σ = 26990801082336. Its totient is φ = 16898229008640.

The previous prime is 21444014001313. The next prime is 21444014001437. The reversal of 21444014001425 is 52410041044412.

It is not a de Polignac number, because 21444014001425 - 2²⁰ = 21444012952849 is a prime.

It is a super-2 number, since 2×21444014001425² (a number of 27 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 = 21444014001391 and 21444014001400.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 14633759 + ... + 16032308.

It is an arithmetic number, because the mean of its divisors is an integer number (1124616711764).

Almost surely, 2^{21444014001425} is an apocalyptic number.

21444014001425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21444014001425 is a deficient number, since it is larger than the sum of its proper divisors (5546787080911).

21444014001425 is a wasteful number, since it uses less digits than its factorization.

21444014001425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30666497 (or 30666492 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 32.

Adding to 21444014001425 its reverse (52410041044412), we get a palindrome (73854055045837).

The spelling of 21444014001425 in words is "twenty-one trillion, four hundred forty-four billion, fourteen million, one thousand, four hundred twenty-five".