18043031433 has 16 divisors (see below), whose sum is σ = 27515514240. Its totient is φ = 10302289536.

The previous prime is 18043031431. The next prime is 18043031441. The reversal of 18043031433 is 33413034081.

It is not a de Polignac number, because 18043031433 - 2¹ = 18043031431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18043031433.

It is not an unprimeable number, because it can be changed into a prime (18043031431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306210 + ... + 360347.

It is an arithmetic number, because the mean of its divisors is an integer number (1719719640).

Almost surely, 2^18043031433 is an apocalyptic number.

It is an amenable number.

18043031433 is a deficient number, since it is larger than the sum of its proper divisors (9472482807).

18043031433 is a wasteful number, since it uses less digits than its factorization.

18043031433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667856.

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 18043031433 in words is "eighteen billion, forty-three million, thirty-one thousand, four hundred thirty-three".