20504206 has 16 divisors (see below), whose sum is σ = 32491008. Its totient is φ = 9689400.

The previous prime is 20504203. The next prime is 20504221. The reversal of 20504206 is 60240502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20504203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1180 + ... + 6511.

It is an arithmetic number, because the mean of its divisors is an integer number (2030688).

Almost surely, 2^20504206 is an apocalyptic number.

20504206 is a deficient number, since it is larger than the sum of its proper divisors (11986802).

20504206 is a wasteful number, since it uses less digits than its factorization.

20504206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7767.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20504206 is about 4528.1570202457. The cubic root of 20504206 is about 273.7038998564.

Adding to 20504206 its reverse (60240502), we get a palindrome (80744708).

The spelling of 20504206 in words is "twenty million, five hundred four thousand, two hundred six".