20033411231 has 4 divisors (see below), whose sum is σ = 20093935464. Its totient is φ = 19972887000.

The previous prime is 20033411219. The next prime is 20033411249. The reversal of 20033411231 is 13211433002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20033411231 is a prime.

It is a super-2 number, since 2×20033411231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20033411291) 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, 30261620 + ... + 30262281.

It is an arithmetic number, because the mean of its divisors is an integer number (5023483866).

Almost surely, 2^20033411231 is an apocalyptic number.

20033411231 is a deficient number, since it is larger than the sum of its proper divisors (60524233).

20033411231 is an equidigital number, since it uses as much as digits as its factorization.

20033411231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60524232.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20033411231 its reverse (13211433002), we get a palindrome (33244844233).

The spelling of 20033411231 in words is "twenty billion, thirty-three million, four hundred eleven thousand, two hundred thirty-one".