20218682 has 8 divisors (see below), whose sum is σ = 33085152. Its totient is φ = 9190300.

The previous prime is 20218673. The next prime is 20218697. The reversal of 20218682 is 28681202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459494 + ... + 459537.

It is an arithmetic number, because the mean of its divisors is an integer number (4135644).

Almost surely, 2^20218682 is an apocalyptic number.

20218682 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20218682 is a deficient number, since it is larger than the sum of its proper divisors (12866470).

20218682 is a wasteful number, since it uses less digits than its factorization.

20218682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919044.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 20218682 is about 4496.5188757527. The cubic root of 20218682 is about 272.4275014048.

Adding to 20218682 its reverse (28681202), we get a palindrome (48899884).

The spelling of 20218682 in words is "twenty million, two hundred eighteen thousand, six hundred eighty-two".