1918930337864 has 16 divisors (see below), whose sum is σ = 3601867373100. Its totient is φ = 958432371712.

The previous prime is 1918930337833. The next prime is 1918930337869. The reversal of 1918930337864 is 4687330398191.

It can be written as a sum of positive squares in 2 ways, for example, as 1802279400100 + 116650937764 = 1342490^2 + 341542^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1918930337797 and 1918930337806.

It is not an unprimeable number, because it can be changed into a prime (1918930337869) 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 in 3 ways as a sum of consecutive naturals, for example, 129091757 + ... + 129106620.

Almost surely, 2^{1918930337864} is an apocalyptic number.

It is an amenable number.

1918930337864 is a deficient number, since it is larger than the sum of its proper divisors (1682937035236).

1918930337864 is a wasteful number, since it uses less digits than its factorization.

1918930337864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258199312 (or 258199308 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 62.

The spelling of 1918930337864 in words is "one trillion, nine hundred eighteen billion, nine hundred thirty million, three hundred thirty-seven thousand, eight hundred sixty-four".