20054205 has 12 divisors (see below), whose sum is σ = 34760700. Its totient is φ = 10695552.

The previous prime is 20054201. The next prime is 20054227. The reversal of 20054205 is 50245002.

It can be written as a sum of positive squares in 2 ways, for example, as 9903609 + 10150596 = 3147^2 + 3186^2 .

It is not a de Polignac number, because 20054205 - 2² = 20054201 is a prime.

It is a super-2 number, since 2×20054205² = 804342276364050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20054201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222780 + ... + 222869.

It is an arithmetic number, because the mean of its divisors is an integer number (2896725).

Almost surely, 2^20054205 is an apocalyptic number.

It is an amenable number.

20054205 is a deficient number, since it is larger than the sum of its proper divisors (14706495).

20054205 is a wasteful number, since it uses less digits than its factorization.

20054205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445660 (or 445657 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 20054205 is about 4478.1921575564. The cubic root of 20054205 is about 271.6867654636.

Adding to 20054205 its reverse (50245002), we get a palindrome (70299207).

The spelling of 20054205 in words is "twenty million, fifty-four thousand, two hundred five".