18737383783787 has 2 divisors, whose sum is σ = 18737383783788. Its totient is φ = 18737383783786.

The previous prime is 18737383783747. The next prime is 18737383783831. The reversal of 18737383783787 is 78738738373781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18737383783787 - 2²⁸ = 18737115348331 is a prime.

It is a super-2 number, since 2×18737383783787² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18737383783747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9368691891893 + 9368691891894.

It is an arithmetic number, because the mean of its divisors is an integer number (9368691891894).

Almost surely, 2^{18737383783787} is an apocalyptic number.

18737383783787 is a deficient number, since it is larger than the sum of its proper divisors (1).

18737383783787 is an equidigital number, since it uses as much as digits as its factorization.

18737383783787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5576159232, while the sum is 80.

The spelling of 18737383783787 in words is "eighteen trillion, seven hundred thirty-seven billion, three hundred eighty-three million, seven hundred eighty-three thousand, seven hundred eighty-seven".