18687244634753 has 2 divisors, whose sum is σ = 18687244634754. Its totient is φ = 18687244634752.

The previous prime is 18687244634741. The next prime is 18687244634759. The reversal of 18687244634753 is 35743644278681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9652032259984 + 9035212374769 = 3106772^2 + 3005863^2 .

It is an emirp because it is prime and its reverse (35743644278681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18687244634753 - 2²⁰ = 18687243586177 is a prime.

It is a super-2 number, since 2×18687244634753² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18687244634759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9343622317376 + 9343622317377.

It is an arithmetic number, because the mean of its divisors is an integer number (9343622317377).

Almost surely, 2^{18687244634753} is an apocalyptic number.

It is an amenable number.

18687244634753 is a deficient number, since it is larger than the sum of its proper divisors (1).

18687244634753 is an equidigital number, since it uses as much as digits as its factorization.

18687244634753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 650280960, while the sum is 68.

The spelling of 18687244634753 in words is "eighteen trillion, six hundred eighty-seven billion, two hundred forty-four million, six hundred thirty-four thousand, seven hundred fifty-three".