1918187368 has 32 divisors (see below), whose sum is σ = 3732012000. Its totient is φ = 923186880.

The previous prime is 1918187357. The next prime is 1918187393. The reversal of 1918187368 is 8637818191.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64303 + ... + 89281.

It is an arithmetic number, because the mean of its divisors is an integer number (116625375).

Almost surely, 2^1918187368 is an apocalyptic number.

It is an amenable number.

1918187368 is a deficient number, since it is larger than the sum of its proper divisors (1813824632).

1918187368 is a wasteful number, since it uses less digits than its factorization.

1918187368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25345 (or 25341 counting only the distinct ones).

The product of its digits is 580608, while the sum is 52.

The square root of 1918187368 is about 43797.1159781098. The cubic root of 1918187368 is about 1242.5017494345.

The spelling of 1918187368 in words is "one billion, nine hundred eighteen million, one hundred eighty-seven thousand, three hundred sixty-eight".