63361818 has 96 divisors (see below), whose sum is σ = 156530880. Its totient is φ = 18982080.

The previous prime is 63361813. The next prime is 63361819. The reversal of 63361818 is 81816336.

63361818 is a `hidden beast` number, since 6 + 33 + 618 + 1 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63361813) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 483613 + ... + 483743.

It is an arithmetic number, because the mean of its divisors is an integer number (1630530).

Almost surely, 2^63361818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63361818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78265440).

63361818 is an abundant number, since it is smaller than the sum of its proper divisors (93169062).

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

63361818 is a wasteful number, since it uses less digits than its factorization.

63361818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 202 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 63361818 is about 7960.0136934556. The cubic root of 63361818 is about 398.6660102909. Note that the first 3 decimals are identical.

The spelling of 63361818 in words is "sixty-three million, three hundred sixty-one thousand, eight hundred eighteen".