18494439739 has 2 divisors, whose sum is σ = 18494439740. Its totient is φ = 18494439738.

The previous prime is 18494439737. The next prime is 18494439797. The reversal of 18494439739 is 93793449481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18494439739 - 2¹ = 18494439737 is a prime.

Together with 18494439737, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18494439737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9247219869 + 9247219870.

It is an arithmetic number, because the mean of its divisors is an integer number (9247219870).

Almost surely, 2^18494439739 is an apocalyptic number.

18494439739 is a deficient number, since it is larger than the sum of its proper divisors (1).

18494439739 is an equidigital number, since it uses as much as digits as its factorization.

18494439739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23514624, while the sum is 61.

The spelling of 18494439739 in words is "eighteen billion, four hundred ninety-four million, four hundred thirty-nine thousand, seven hundred thirty-nine".