18743916761 has 2 divisors, whose sum is σ = 18743916762. Its totient is φ = 18743916760.

The previous prime is 18743916757. The next prime is 18743916781. The reversal of 18743916761 is 16761934781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16957248400 + 1786668361 = 130220^2 + 42269^2 .

It is a cyclic number.

It is not a de Polignac number, because 18743916761 - 2² = 18743916757 is a prime.

It is a super-2 number, since 2×18743916761² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18743916701) 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 as a sum of consecutive naturals, namely, 9371958380 + 9371958381.

It is an arithmetic number, because the mean of its divisors is an integer number (9371958381).

Almost surely, 2^18743916761 is an apocalyptic number.

It is an amenable number.

18743916761 is a deficient number, since it is larger than the sum of its proper divisors (1).

18743916761 is an equidigital number, since it uses as much as digits as its factorization.

18743916761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 53.

The spelling of 18743916761 in words is "eighteen billion, seven hundred forty-three million, nine hundred sixteen thousand, seven hundred sixty-one".