1818036396 has 36 divisors (see below), whose sum is σ = 5013374184. Its totient is φ = 550920000.

The previous prime is 1818036383. The next prime is 1818036421. The reversal of 1818036396 is 6936308181.

It is a happy number.

1818036396 is a `hidden beast` number, since 1 + 8 + 1 + 8 + 0 + 3 + 639 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2295105 + ... + 2295896.

It is an arithmetic number, because the mean of its divisors is an integer number (139260394).

Almost surely, 2^1818036396 is an apocalyptic number.

It is an amenable number.

1818036396 is an abundant number, since it is smaller than the sum of its proper divisors (3195337788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1818036396 is a wasteful number, since it uses less digits than its factorization.

1818036396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4591022 (or 4591017 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 1818036396 is about 42638.4380107902. The cubic root of 1818036396 is about 1220.4899035793.

The spelling of 1818036396 in words is "one billion, eight hundred eighteen million, thirty-six thousand, three hundred ninety-six".