21632233316357 has 4 divisors (see below), whose sum is σ = 22330047294336. Its totient is φ = 20934419338380.

The previous prime is 21632233316341. The next prime is 21632233316471. The reversal of 21632233316357 is 75361333223612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21632233316357 - 2⁴ = 21632233316341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21632233316327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348906988943 + ... + 348906989004.

It is an arithmetic number, because the mean of its divisors is an integer number (5582511823584).

Almost surely, 2^{21632233316357} is an apocalyptic number.

It is an amenable number.

21632233316357 is a deficient number, since it is larger than the sum of its proper divisors (697813977979).

21632233316357 is an equidigital number, since it uses as much as digits as its factorization.

21632233316357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697813977978.

The product of its digits is 2449440, while the sum is 47.

Adding to 21632233316357 its reverse (75361333223612), we get a palindrome (96993566539969).

The spelling of 21632233316357 in words is "twenty-one trillion, six hundred thirty-two billion, two hundred thirty-three million, three hundred sixteen thousand, three hundred fifty-seven".