20063618 has 4 divisors (see below), whose sum is σ = 30095430. Its totient is φ = 10031808.

The previous prime is 20063611. The next prime is 20063623. The reversal of 20063618 is 81636002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16540489 + 3523129 = 4067^2 + 1877^2 .

It is not an unprimeable number, because it can be changed into a prime (20063611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5015903 + ... + 5015906.

Almost surely, 2^20063618 is an apocalyptic number.

20063618 is a deficient number, since it is larger than the sum of its proper divisors (10031812).

20063618 is a wasteful number, since it uses less digits than its factorization.

20063618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10031811.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20063618 is about 4479.2430164036. The cubic root of 20063618 is about 271.7292667329.

The spelling of 20063618 in words is "twenty million, sixty-three thousand, six hundred eighteen".