20211223336 has 8 divisors (see below), whose sum is σ = 37896043770. Its totient is φ = 10105611664.

The previous prime is 20211223321. The next prime is 20211223337. The reversal of 20211223336 is 63332211202.

It can be written as a sum of positive squares in only one way, i.e., 19014755236 + 1196468100 = 137894^2 + 34590^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 20211223336.

It is not an unprimeable number, because it can be changed into a prime (20211223337) 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 as a sum of consecutive naturals, namely, 1263201451 + ... + 1263201466.

Almost surely, 2^20211223336 is an apocalyptic number.

It is an amenable number.

20211223336 is a deficient number, since it is larger than the sum of its proper divisors (17684820434).

20211223336 is a wasteful number, since it uses less digits than its factorization.

20211223336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526402923 (or 2526402919 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 20211223336 its reverse (63332211202), we get a palindrome (83543434538).

The spelling of 20211223336 in words is "twenty billion, two hundred eleven million, two hundred twenty-three thousand, three hundred thirty-six".