20001201233 has 8 divisors (see below), whose sum is σ = 22806799848. Its totient is φ = 17376609024.

The previous prime is 20001201229. The next prime is 20001201239. The reversal of 20001201233 is 33210210002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2004173824 + 17997027409 = 44768^2 + 134153^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20001201233 - 2² = 20001201229 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001201239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45251366 + ... + 45251807.

It is an arithmetic number, because the mean of its divisors is an integer number (2850849981).

Almost surely, 2^20001201233 is an apocalyptic number.

It is an amenable number.

20001201233 is a deficient number, since it is larger than the sum of its proper divisors (2805598615).

20001201233 is a wasteful number, since it uses less digits than its factorization.

20001201233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90503203.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20001201233 its reverse (33210210002), we get a palindrome (53211411235).

The spelling of 20001201233 in words is "twenty billion, one million, two hundred one thousand, two hundred thirty-three".