20031111133 has 48 divisors (see below), whose sum is σ = 23565769920. Its totient is φ = 16964640000.

The previous prime is 20031111127. The next prime is 20031111137. The reversal of 20031111133 is 33111113002.

It is not a de Polignac number, because 20031111133 - 2¹⁷ = 20030980061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031111137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65247766 + ... + 65248072.

It is an arithmetic number, because the mean of its divisors is an integer number (490953540).

Almost surely, 2^20031111133 is an apocalyptic number.

It is an amenable number.

20031111133 is a deficient number, since it is larger than the sum of its proper divisors (3534658787).

20031111133 is a wasteful number, since it uses less digits than its factorization.

20031111133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 20031111133 its reverse (33111113002), we get a palindrome (53142224135).

The spelling of 20031111133 in words is "twenty billion, thirty-one million, one hundred eleven thousand, one hundred thirty-three".