20501226 has 12 divisors (see below), whose sum is σ = 44419362. Its totient is φ = 6833736.

The previous prime is 20501213. The next prime is 20501227. The reversal of 20501226 is 62210502.

It can be written as a sum of positive squares in only one way, i.e., 11229201 + 9272025 = 3351^2 + 3045^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1138957 = 20501226 / (2 + 0 + 5 + 0 + 1 + 2 + 2 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 20501199 and 20501208.

It is not an unprimeable number, because it can be changed into a prime (20501227) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 569461 + ... + 569496.

Almost surely, 2^20501226 is an apocalyptic number.

20501226 is an abundant number, since it is smaller than the sum of its proper divisors (23918136).

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

20501226 is a wasteful number, since it uses less digits than its factorization.

20501226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138965 (or 1138962 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 20501226 is about 4527.8279560955. The cubic root of 20501226 is about 273.6906395342.

Adding to 20501226 its reverse (62210502), we get a palindrome (82711728).

The spelling of 20501226 in words is "twenty million, five hundred one thousand, two hundred twenty-six".