21453520250041 has 32 divisors (see below), whose sum is σ = 24670362240000. Its totient is φ = 18450669706560.

The previous prime is 21453520249999. The next prime is 21453520250047. The reversal of 21453520250041 is 14005202535412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21453520250041 - 2⁷ = 21453520249913 is a prime.

It is a super-2 number, since 2×21453520250041² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21453520249979 and 21453520250006.

It is not an unprimeable number, because it can be changed into a prime (21453520250047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1157200950 + ... + 1157219488.

It is an arithmetic number, because the mean of its divisors is an integer number (770948820000).

Almost surely, 2^{21453520250041} is an apocalyptic number.

It is an amenable number.

21453520250041 is a deficient number, since it is larger than the sum of its proper divisors (3216841989959).

21453520250041 is a wasteful number, since it uses less digits than its factorization.

21453520250041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26077.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 21453520250041 its reverse (14005202535412), we get a palindrome (35458722785453).

The spelling of 21453520250041 in words is "twenty-one trillion, four hundred fifty-three billion, five hundred twenty million, two hundred fifty thousand, forty-one".