20133236143 has 4 divisors (see below), whose sum is σ = 20133528448. Its totient is φ = 20132943840.

The previous prime is 20133236117. The next prime is 20133236147. The reversal of 20133236143 is 34163233102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20133236143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133236147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20530 + ... + 201712.

It is an arithmetic number, because the mean of its divisors is an integer number (5033382112).

Almost surely, 2^20133236143 is an apocalyptic number.

20133236143 is a deficient number, since it is larger than the sum of its proper divisors (292305).

20133236143 is a wasteful number, since it uses less digits than its factorization.

20133236143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292304.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 20133236143 its reverse (34163233102), we get a palindrome (54296469245).

The spelling of 20133236143 in words is "twenty billion, one hundred thirty-three million, two hundred thirty-six thousand, one hundred forty-three".