1918156396 has 24 divisors (see below), whose sum is σ = 3739644720. Its totient is φ = 854774592.

The previous prime is 1918156379. The next prime is 1918156397. The reversal of 1918156396 is 6936518191.

It is not an unprimeable number, because it can be changed into a prime (1918156397) 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 7 ways as a sum of consecutive naturals, for example, 634486 + ... + 637501.

It is an arithmetic number, because the mean of its divisors is an integer number (155818530).

Almost surely, 2^1918156396 is an apocalyptic number.

It is an amenable number.

1918156396 is a deficient number, since it is larger than the sum of its proper divisors (1821488324).

1918156396 is a wasteful number, since it uses less digits than its factorization.

1918156396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272033 (or 1272031 counting only the distinct ones).

The product of its digits is 349920, while the sum is 49.

The square root of 1918156396 is about 43796.7623917568. The cubic root of 1918156396 is about 1242.4950620496.

The spelling of 1918156396 in words is "one billion, nine hundred eighteen million, one hundred fifty-six thousand, three hundred ninety-six".