18036578741 has 2 divisors, whose sum is σ = 18036578742. Its totient is φ = 18036578740.

The previous prime is 18036578669. The next prime is 18036578743. The reversal of 18036578741 is 14787563081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14854490641 + 3182088100 = 121879^2 + 56410^2 .

It is an emirp because it is prime and its reverse (14787563081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18036578741 - 2²² = 18032384437 is a prime.

Together with 18036578743, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18036578741.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18036578743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9018289370 + 9018289371.

It is an arithmetic number, because the mean of its divisors is an integer number (9018289371).

Almost surely, 2^18036578741 is an apocalyptic number.

It is an amenable number.

18036578741 is a deficient number, since it is larger than the sum of its proper divisors (1).

18036578741 is an equidigital number, since it uses as much as digits as its factorization.

18036578741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 18036578741 in words is "eighteen billion, thirty-six million, five hundred seventy-eight thousand, seven hundred forty-one".