20507226 has 32 divisors (see below), whose sum is σ = 42040320. Its totient is φ = 6667056.

The previous prime is 20507203. The next prime is 20507231. The reversal of 20507226 is 62270502.

20507226 = 313² + 314² + ... + 451².

It is a junction number, because it is equal to n+sod(n) for n = 20507196 and 20507205.

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 15 ways as a sum of consecutive naturals, for example, 55695 + ... + 56061.

It is an arithmetic number, because the mean of its divisors is an integer number (1313760).

Almost surely, 2^20507226 is an apocalyptic number.

20507226 is an abundant number, since it is smaller than the sum of its proper divisors (21533094).

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

20507226 is a wasteful number, since it uses less digits than its factorization.

20507226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20507226 is about 4528.4904769691. The cubic root of 20507226 is about 273.7173368589.

Adding to 20507226 its reverse (62270502), we get a palindrome (82777728).

The spelling of 20507226 in words is "twenty million, five hundred seven thousand, two hundred twenty-six".