20505026 has 16 divisors (see below), whose sum is σ = 32651424. Its totient is φ = 9624384.

The previous prime is 20505007. The next prime is 20505031. The reversal of 20505026 is 62050502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20504989 and 20505007.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 22781 + ... + 23663.

It is an arithmetic number, because the mean of its divisors is an integer number (2040714).

Almost surely, 2^20505026 is an apocalyptic number.

20505026 is a deficient number, since it is larger than the sum of its proper divisors (12146398).

20505026 is a wasteful number, since it uses less digits than its factorization.

20505026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20505026 is about 4528.2475639037. The cubic root of 20505026 is about 273.7075484445.

Adding to 20505026 its reverse (62050502), we get a palindrome (82555528).

The spelling of 20505026 in words is "twenty million, five hundred five thousand, twenty-six".