20538204 has 12 divisors (see below), whose sum is σ = 47922504. Its totient is φ = 6846064.

The previous prime is 20538187. The next prime is 20538211. The reversal of 20538204 is 40283502.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 855747 + ... + 855770.

It is an arithmetic number, because the mean of its divisors is an integer number (3993542).

Almost surely, 2^20538204 is an apocalyptic number.

It is an amenable number.

20538204 is an abundant number, since it is smaller than the sum of its proper divisors (27384300).

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

20538204 is a wasteful number, since it uses less digits than its factorization.

20538204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711524 (or 1711522 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 20538204 is about 4531.9095313124. The cubic root of 20538204 is about 273.8550923620.

The spelling of 20538204 in words is "twenty million, five hundred thirty-eight thousand, two hundred four".