21024454152345 has 48 divisors (see below), whose sum is σ = 39667273286400. Its totient is φ = 9479519030016.

The previous prime is 21024454152341. The next prime is 21024454152419. The reversal of 21024454152345 is 54325145442012.

It is not a de Polignac number, because 21024454152345 - 2² = 21024454152341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21024454152297 and 21024454152306.

It is not an unprimeable number, because it can be changed into a prime (21024454152341) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 195868945 + ... + 195976254.

It is an arithmetic number, because the mean of its divisors is an integer number (826401526800).

Almost surely, 2^{21024454152345} is an apocalyptic number.

It is an amenable number.

21024454152345 is a deficient number, since it is larger than the sum of its proper divisors (18642819134055).

21024454152345 is a wasteful number, since it uses less digits than its factorization.

21024454152345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391845294 (or 391845287 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 42.

Adding to 21024454152345 its reverse (54325145442012), we get a palindrome (75349599594357).

The spelling of 21024454152345 in words is "twenty-one trillion, twenty-four billion, four hundred fifty-four million, one hundred fifty-two thousand, three hundred forty-five".