21324230133 has 16 divisors (see below), whose sum is σ = 28587499200. Its totient is φ = 14138699904.

The previous prime is 21324230129. The next prime is 21324230141. The reversal of 21324230133 is 33103242312.

It is not a de Polignac number, because 21324230133 - 2² = 21324230129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324230153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 599943 + ... + 634491.

It is an arithmetic number, because the mean of its divisors is an integer number (1786718700).

Almost surely, 2^21324230133 is an apocalyptic number.

It is an amenable number.

21324230133 is a deficient number, since it is larger than the sum of its proper divisors (7263269067).

21324230133 is a wasteful number, since it uses less digits than its factorization.

21324230133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35668.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21324230133 its reverse (33103242312), we get a palindrome (54427472445).

The spelling of 21324230133 in words is "twenty-one billion, three hundred twenty-four million, two hundred thirty thousand, one hundred thirty-three".