20218602 has 8 divisors (see below), whose sum is σ = 40437216. Its totient is φ = 6739532.

The previous prime is 20218589. The next prime is 20218607. The reversal of 20218602 is 20681202.

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

20218602 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20218607) by changing a digit.

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, 1684878 + ... + 1684889.

It is an arithmetic number, because the mean of its divisors is an integer number (5054652).

Almost surely, 2^20218602 is an apocalyptic number.

20218602 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20218602 is a wasteful number, since it uses less digits than its factorization.

20218602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3369772.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20218602 is about 4496.5099799734. The cubic root of 20218602 is about 272.4271420963.

Adding to 20218602 its reverse (20681202), we get a palindrome (40899804).

The spelling of 20218602 in words is "twenty million, two hundred eighteen thousand, six hundred two".