18729033043 has 4 divisors (see below), whose sum is σ = 21404609200. Its totient is φ = 16053456888.

The previous prime is 18729033017. The next prime is 18729033047. The reversal of 18729033043 is 34033092781.

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

It is not a de Polignac number, because 18729033043 - 2¹³ = 18729024851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18729032987 and 18729033005.

It is not an unprimeable number, because it can be changed into a prime (18729033047) 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, 1337788068 + ... + 1337788081.

It is an arithmetic number, because the mean of its divisors is an integer number (5351152300).

Almost surely, 2^18729033043 is an apocalyptic number.

18729033043 is a deficient number, since it is larger than the sum of its proper divisors (2675576157).

18729033043 is an equidigital number, since it uses as much as digits as its factorization.

18729033043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675576156.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 18729033043 in words is "eighteen billion, seven hundred twenty-nine million, thirty-three thousand, forty-three".