21044050325 has 24 divisors (see below), whose sum is σ = 26781160896. Its totient is φ = 16398032000.

The previous prime is 21044050319. The next prime is 21044050327. The reversal of 21044050325 is 52305044012.

It is a happy number.

It is not a de Polignac number, because 21044050325 - 2¹² = 21044046229 is a prime.

It is a super-2 number, since 2×21044050325² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21044050294 and 21044050303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21044050327) 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, 75905 + ... + 218745.

It is an arithmetic number, because the mean of its divisors is an integer number (1115881704).

Almost surely, 2^21044050325 is an apocalyptic number.

21044050325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21044050325 is a deficient number, since it is larger than the sum of its proper divisors (5737110571).

21044050325 is a wasteful number, since it uses less digits than its factorization.

21044050325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143005 (or 143000 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 21044050325 its reverse (52305044012), we get a palindrome (73349094337).

The spelling of 21044050325 in words is "twenty-one billion, forty-four million, fifty thousand, three hundred twenty-five".