18533431133 has 16 divisors (see below), whose sum is σ = 21444210816. Its totient is φ = 15688581120.

The previous prime is 18533431129. The next prime is 18533431141. The reversal of 18533431133 is 33113433581.

It is a cyclic number.

It is not a de Polignac number, because 18533431133 - 2² = 18533431129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18533431093 and 18533431102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18533431153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2409053 + ... + 2416733.

It is an arithmetic number, because the mean of its divisors is an integer number (1340263176).

Almost surely, 2^18533431133 is an apocalyptic number.

It is an amenable number.

18533431133 is a deficient number, since it is larger than the sum of its proper divisors (2910779683).

18533431133 is an equidigital number, since it uses as much as digits as its factorization.

18533431133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11924.

The product of its digits is 38880, while the sum is 35.

The spelling of 18533431133 in words is "eighteen billion, five hundred thirty-three million, four hundred thirty-one thousand, one hundred thirty-three".