21243411153 has 24 divisors (see below), whose sum is σ = 30832689888. Its totient is φ = 14094222912.

The previous prime is 21243411109. The next prime is 21243411227. The reversal of 21243411153 is 35111434212.

21243411153 is a `hidden beast` number, since 2 + 1 + 243 + 411 + 1 + 5 + 3 = 666.

It is not a de Polignac number, because 21243411153 - 2⁸ = 21243410897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21243411053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1881501 + ... + 1892757.

It is an arithmetic number, because the mean of its divisors is an integer number (1284695412).

Almost surely, 2^21243411153 is an apocalyptic number.

It is an amenable number.

21243411153 is a deficient number, since it is larger than the sum of its proper divisors (9589278735).

21243411153 is a wasteful number, since it uses less digits than its factorization.

21243411153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12253 (or 12250 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

Adding to 21243411153 its reverse (35111434212), we get a palindrome (56354845365).

The spelling of 21243411153 in words is "twenty-one billion, two hundred forty-three million, four hundred eleven thousand, one hundred fifty-three".