23221211636 has 12 divisors (see below), whose sum is σ = 46442423328. Its totient is φ = 9951947832.

The previous prime is 23221211621. The next prime is 23221211639. The reversal of 23221211636 is 63611212232.

It is a happy number.

23221211636 is an admirable number.

It is a super-3 number, since 3×23221211636³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23221211599 and 23221211608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221211639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414664466 + ... + 414664521.

It is an arithmetic number, because the mean of its divisors is an integer number (3870201944).

Almost surely, 2^23221211636 is an apocalyptic number.

It is an amenable number.

23221211636 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23221211636 is a wasteful number, since it uses less digits than its factorization.

23221211636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829328998 (or 829328996 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

Adding to 23221211636 its reverse (63611212232), we get a palindrome (86832423868).

The spelling of 23221211636 in words is "twenty-three billion, two hundred twenty-one million, two hundred eleven thousand, six hundred thirty-six".