21632323263 has 8 divisors (see below), whose sum is σ = 29009821488. Its totient is φ = 14338186944.

The previous prime is 21632323253. The next prime is 21632323277. The reversal of 21632323263 is 36232323612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21632323263 - 2⁵ = 21632323231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21632323253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20839870 + ... + 20840907.

It is an arithmetic number, because the mean of its divisors is an integer number (3626227686).

Almost surely, 2^21632323263 is an apocalyptic number.

21632323263 is a deficient number, since it is larger than the sum of its proper divisors (7377498225).

21632323263 is a wasteful number, since it uses less digits than its factorization.

21632323263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41680953.

The product of its digits is 46656, while the sum is 33.

Adding to 21632323263 its reverse (36232323612), we get a palindrome (57864646875).

The spelling of 21632323263 in words is "twenty-one billion, six hundred thirty-two million, three hundred twenty-three thousand, two hundred sixty-three".