21245550045325 has 6 divisors (see below), whose sum is σ = 26344482056234. Its totient is φ = 16996440036240.

The previous prime is 21245550045241. The next prime is 21245550045359. The reversal of 21245550045325 is 52354005554212.

It can be written as a sum of positive squares in 3 ways, for example, as 4472945824356 + 16772604220969 = 2114934^2 + 4095437^2 .

It is not a de Polignac number, because 21245550045325 - 2⁷ = 21245550045197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 424911000882 + ... + 424911000931.

Almost surely, 2^{21245550045325} is an apocalyptic number.

21245550045325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21245550045325 is a deficient number, since it is larger than the sum of its proper divisors (5098932010909).

21245550045325 is an equidigital number, since it uses as much as digits as its factorization.

21245550045325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849822001823 (or 849822001818 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 43.

Adding to 21245550045325 its reverse (52354005554212), we get a palindrome (73599555599537).

The spelling of 21245550045325 in words is "twenty-one trillion, two hundred forty-five billion, five hundred fifty million, forty-five thousand, three hundred twenty-five".