18386722043 has 4 divisors (see below), whose sum is σ = 18619465440. Its totient is φ = 18153978648.

The previous prime is 18386722027. The next prime is 18386722069. The reversal of 18386722043 is 34022768381.

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

It is a cyclic number.

It is not a de Polignac number, because 18386722043 - 2⁴ = 18386722027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18386721985 and 18386722003.

It is not an unprimeable number, because it can be changed into a prime (18386725043) 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, 116371580 + ... + 116371737.

It is an arithmetic number, because the mean of its divisors is an integer number (4654866360).

Almost surely, 2^18386722043 is an apocalyptic number.

18386722043 is a deficient number, since it is larger than the sum of its proper divisors (232743397).

18386722043 is an equidigital number, since it uses as much as digits as its factorization.

18386722043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232743396.

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 18386722043 in words is "eighteen billion, three hundred eighty-six million, seven hundred twenty-two thousand, forty-three".