21000232233 has 8 divisors (see below), whose sum is σ = 31111455200. Its totient is φ = 14000154804.

The previous prime is 21000232223. The next prime is 21000232247. The reversal of 21000232233 is 33223200012.

It is a happy number.

It is not a de Polignac number, because 21000232233 - 2⁴ = 21000232217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000232223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388893163 + ... + 388893216.

It is an arithmetic number, because the mean of its divisors is an integer number (3888931900).

Almost surely, 2^21000232233 is an apocalyptic number.

It is an amenable number.

21000232233 is a deficient number, since it is larger than the sum of its proper divisors (10111222967).

21000232233 is an equidigital number, since it uses as much as digits as its factorization.

21000232233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777786388 (or 777786382 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21000232233 its reverse (33223200012), we get a palindrome (54223432245).

The spelling of 21000232233 in words is "twenty-one billion, two hundred thirty-two thousand, two hundred thirty-three".