21236530323 has 32 divisors (see below), whose sum is σ = 29236896000. Its totient is φ = 13701294720.

The previous prime is 21236530309. The next prime is 21236530327. The reversal of 21236530323 is 32303563212.

It is not a de Polignac number, because 21236530323 - 2⁴ = 21236530307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21236530327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25866253 + ... + 25867073.

It is an arithmetic number, because the mean of its divisors is an integer number (913653000).

Almost surely, 2^21236530323 is an apocalyptic number.

21236530323 is a deficient number, since it is larger than the sum of its proper divisors (8000365677).

21236530323 is a wasteful number, since it uses less digits than its factorization.

21236530323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827.

The product of its (nonzero) digits is 19440, while the sum is 30.

The spelling of 21236530323 in words is "twenty-one billion, two hundred thirty-six million, five hundred thirty thousand, three hundred twenty-three".