21623533422233 has 4 divisors (see below), whose sum is σ = 22895505976500. Its totient is φ = 20351560867968.

The previous prime is 21623533422191. The next prime is 21623533422277. The reversal of 21623533422233 is 33222433532612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19822912957849 + 1800620464384 = 4452293^2 + 1341872^2 .

It is a cyclic number.

It is not a de Polignac number, because 21623533422233 - 2³⁸ = 21348655515289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21623533422433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 635986277108 + ... + 635986277141.

It is an arithmetic number, because the mean of its divisors is an integer number (5723876494125).

Almost surely, 2^{21623533422233} is an apocalyptic number.

It is an amenable number.

21623533422233 is a deficient number, since it is larger than the sum of its proper divisors (1271972554267).

21623533422233 is a wasteful number, since it uses less digits than its factorization.

21623533422233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271972554266.

The product of its digits is 933120, while the sum is 41.

Adding to 21623533422233 its reverse (33222433532612), we get a palindrome (54845966954845).

The spelling of 21623533422233 in words is "twenty-one trillion, six hundred twenty-three billion, five hundred thirty-three million, four hundred twenty-two thousand, two hundred thirty-three".