1814681918 has 16 divisors (see below), whose sum is σ = 3135381504. Its totient is φ = 771596280.

The previous prime is 1814681819. The next prime is 1814681933. The reversal of 1814681918 is 8191864181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 508538 + ... + 512093.

It is an arithmetic number, because the mean of its divisors is an integer number (195961344).

Almost surely, 2^1814681918 is an apocalyptic number.

1814681918 is a deficient number, since it is larger than the sum of its proper divisors (1320699586).

1814681918 is a wasteful number, since it uses less digits than its factorization.

1814681918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020767.

The product of its digits is 110592, while the sum is 47.

The square root of 1814681918 is about 42599.0835347429. The cubic root of 1814681918 is about 1219.7387951947.

The spelling of 1814681918 in words is "one billion, eight hundred fourteen million, six hundred eighty-one thousand, nine hundred eighteen".