21524254030252 has 12 divisors (see below), whose sum is σ = 37669007232360. Its totient is φ = 10761680535296.

The previous prime is 21524254030247. The next prime is 21524254030333. The reversal of 21524254030252 is 25203045242512.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111511477 + ... + 111704332.

It is an arithmetic number, because the mean of its divisors is an integer number (3139083936030).

Almost surely, 2^{21524254030252} is an apocalyptic number.

It is an amenable number.

21524254030252 is a deficient number, since it is larger than the sum of its proper divisors (16144753202108).

21524254030252 is a wasteful number, since it uses less digits than its factorization.

21524254030252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223239920 (or 223239918 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 21524254030252 its reverse (25203045242512), we get a palindrome (46727299272764).

The spelling of 21524254030252 in words is "twenty-one trillion, five hundred twenty-four billion, two hundred fifty-four million, thirty thousand, two hundred fifty-two".