21233644633189 has 2 divisors, whose sum is σ = 21233644633190. Its totient is φ = 21233644633188.

The previous prime is 21233644633177. The next prime is 21233644633219. The reversal of 21233644633189 is 98133644633212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19458314900964 + 1775329732225 = 4411158^2 + 1332415^2 .

It is a cyclic number.

It is not a de Polignac number, because 21233644633189 - 2²⁷ = 21233510415461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21233644633139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616822316594 + 10616822316595.

It is an arithmetic number, because the mean of its divisors is an integer number (10616822316595).

Almost surely, 2^{21233644633189} is an apocalyptic number.

It is an amenable number.

21233644633189 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233644633189 is an equidigital number, since it uses as much as digits as its factorization.

21233644633189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13436928, while the sum is 55.

The spelling of 21233644633189 in words is "twenty-one trillion, two hundred thirty-three billion, six hundred forty-four million, six hundred thirty-three thousand, one hundred eighty-nine".