18216743059 has 4 divisors (see below), whose sum is σ = 18709087504. Its totient is φ = 17724398616.

The previous prime is 18216743053. The next prime is 18216743071. The reversal of 18216743059 is 95034761281.

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 18216743059 - 2²¹ = 18214645907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18216743053) 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, 246172167 + ... + 246172240.

It is an arithmetic number, because the mean of its divisors is an integer number (4677271876).

It is a 1-persistent number, because it is pandigital, but 2⋅18216743059 = 36433486118 is not.

Almost surely, 2^18216743059 is an apocalyptic number.

18216743059 is a deficient number, since it is larger than the sum of its proper divisors (492344445).

18216743059 is an equidigital number, since it uses as much as digits as its factorization.

18216743059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492344444.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 18216743059 in words is "eighteen billion, two hundred sixteen million, seven hundred forty-three thousand, fifty-nine".