18958543741 has 2 divisors, whose sum is σ = 18958543742. Its totient is φ = 18958543740.

The previous prime is 18958543733. The next prime is 18958543771. The reversal of 18958543741 is 14734585981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13824821241 + 5133722500 = 117579^2 + 71650^2 .

It is an emirp because it is prime and its reverse (14734585981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18958543741 - 2³ = 18958543733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18958543771) 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, 9479271870 + 9479271871.

It is an arithmetic number, because the mean of its divisors is an integer number (9479271871).

Almost surely, 2^18958543741 is an apocalyptic number.

It is an amenable number.

18958543741 is a deficient number, since it is larger than the sum of its proper divisors (1).

18958543741 is an equidigital number, since it uses as much as digits as its factorization.

18958543741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4838400, while the sum is 55.

The spelling of 18958543741 in words is "eighteen billion, nine hundred fifty-eight million, five hundred forty-three thousand, seven hundred forty-one".