20548218 has 8 divisors (see below), whose sum is σ = 41096448. Its totient is φ = 6849404.

The previous prime is 20548217. The next prime is 20548237. The reversal of 20548218 is 81284502.

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

20548218 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20548217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1712346 + ... + 1712357.

It is an arithmetic number, because the mean of its divisors is an integer number (5137056).

Almost surely, 2^20548218 is an apocalyptic number.

20548218 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.

20548218 is a wasteful number, since it uses less digits than its factorization.

20548218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424708.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 20548218 is about 4533.0142289651. The cubic root of 20548218 is about 273.8995938076.

The spelling of 20548218 in words is "twenty million, five hundred forty-eight thousand, two hundred eighteen".