18216516739 has 8 divisors (see below), whose sum is σ = 18874807920. Its totient is φ = 17569876896.

The previous prime is 18216516713. The next prime is 18216516743. The reversal of 18216516739 is 93761561281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18216516739 - 2¹³ = 18216508547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18216516692 and 18216516701.

It is not an unprimeable number, because it can be changed into a prime (18216516839) 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 7 ways as a sum of consecutive naturals, for example, 2909652 + ... + 2915905.

It is an arithmetic number, because the mean of its divisors is an integer number (2359350990).

Almost surely, 2^18216516739 is an apocalyptic number.

18216516739 is a deficient number, since it is larger than the sum of its proper divisors (658291181).

18216516739 is an equidigital number, since it uses as much as digits as its factorization.

18216516739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825669.

The product of its digits is 544320, while the sum is 49.

The spelling of 18216516739 in words is "eighteen billion, two hundred sixteen million, five hundred sixteen thousand, seven hundred thirty-nine".