1818412636 has 12 divisors (see below), whose sum is σ = 3291954120. Its totient is φ = 877854320.

The previous prime is 1818412621. The next prime is 1818412639. The reversal of 1818412636 is 6362148181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818412639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7837870 + ... + 7838101.

It is an arithmetic number, because the mean of its divisors is an integer number (274329510).

Almost surely, 2^1818412636 is an apocalyptic number.

It is an amenable number.

1818412636 is a deficient number, since it is larger than the sum of its proper divisors (1473541484).

1818412636 is a wasteful number, since it uses less digits than its factorization.

1818412636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15676004 (or 15676002 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 1818412636 is about 42642.8497640577. The cubic root of 1818412636 is about 1220.5740906449.

The spelling of 1818412636 in words is "one billion, eight hundred eighteen million, four hundred twelve thousand, six hundred thirty-six".