4218394636 has 12 divisors (see below), whose sum is σ = 7636749120. Its totient is φ = 2036466320.

The previous prime is 4218394633. The next prime is 4218394651. The reversal of 4218394636 is 6364938124.

It is not an unprimeable number, because it can be changed into a prime (4218394633) 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, 18182620 + ... + 18182851.

It is an arithmetic number, because the mean of its divisors is an integer number (636395760).

Almost surely, 2^4218394636 is an apocalyptic number.

It is an amenable number.

4218394636 is a deficient number, since it is larger than the sum of its proper divisors (3418354484).

4218394636 is a wasteful number, since it uses less digits than its factorization.

4218394636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36365504 (or 36365502 counting only the distinct ones).

The product of its digits is 746496, while the sum is 46.

The square root of 4218394636 is about 64949.1696328752. The cubic root of 4218394636 is about 1615.7806468556.

The spelling of 4218394636 in words is "four billion, two hundred eighteen million, three hundred ninety-four thousand, six hundred thirty-six".