3636381820 has 12 divisors (see below), whose sum is σ = 7636401864. Its totient is φ = 1454552720.

The previous prime is 3636381797. The next prime is 3636381841. The reversal of 3636381820 is 281836363.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90909526 + ... + 90909565.

It is an arithmetic number, because the mean of its divisors is an integer number (636366822).

Almost surely, 2^3636381820 is an apocalyptic number.

It is an amenable number.

3636381820 is an abundant number, since it is smaller than the sum of its proper divisors (4000020044).

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

3636381820 is a wasteful number, since it uses less digits than its factorization.

3636381820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181819100 (or 181819098 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 3636381820 is about 60302.4196861121. The cubic root of 3636381820 is about 1537.7644828458.

The spelling of 3636381820 in words is "three billion, six hundred thirty-six million, three hundred eighty-one thousand, eight hundred twenty".