21450001444325 has 12 divisors (see below), whose sum is σ = 26598445360260. Its totient is φ = 17159714981760.

The previous prime is 21450001444309. The next prime is 21450001444369. The reversal of 21450001444325 is 52344410005412.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4742852040481 + 16707149403844 = 2177809^2 + 4087438^2 .

It is not a de Polignac number, because 21450001444325 - 2⁴ = 21450001444309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5618810 + ... + 8629659.

It is an arithmetic number, because the mean of its divisors is an integer number (2216537113355).

Almost surely, 2^{21450001444325} is an apocalyptic number.

21450001444325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21450001444325 is a deficient number, since it is larger than the sum of its proper divisors (5148443915935).

21450001444325 is a wasteful number, since it uses less digits than its factorization.

21450001444325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14308696 (or 14308691 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 21450001444325 its reverse (52344410005412), we get a palindrome (73794411449737).

The spelling of 21450001444325 in words is "twenty-one trillion, four hundred fifty billion, one million, four hundred forty-four thousand, three hundred twenty-five".