1918826985813 has 16 divisors (see below), whose sum is σ = 2618047012416. Its totient is φ = 1249415032320.

The previous prime is 1918826985799. The next prime is 1918826985821. The reversal of 1918826985813 is 3185896288191.

It is not a de Polignac number, because 1918826985813 - 2¹⁴ = 1918826969429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918826985893) 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 in 15 ways as a sum of consecutive naturals, for example, 2811781 + ... + 3426917.

It is an arithmetic number, because the mean of its divisors is an integer number (163627938276).

Almost surely, 2^{1918826985813} is an apocalyptic number.

It is an amenable number.

1918826985813 is a deficient number, since it is larger than the sum of its proper divisors (699220026603).

1918826985813 is a wasteful number, since it uses less digits than its factorization.

1918826985813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639364.

The product of its digits is 59719680, while the sum is 69.

The spelling of 1918826985813 in words is "one trillion, nine hundred eighteen billion, eight hundred twenty-six million, nine hundred eighty-five thousand, eight hundred thirteen".