20510226 has 96 divisors (see below), whose sum is σ = 51965760. Its totient is φ = 5987520.

The previous prime is 20510219. The next prime is 20510233. The reversal of 20510226 is 62201502.

It is an interprime number because it is at equal distance from previous prime (20510219) and next prime (20510233).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20510199 and 20510208.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 280926 + ... + 280998.

It is an arithmetic number, because the mean of its divisors is an integer number (541310).

Almost surely, 2^20510226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20510226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25982880).

20510226 is an abundant number, since it is smaller than the sum of its proper divisors (31455534).

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

20510226 is a wasteful number, since it uses less digits than its factorization.

20510226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 132 counting only the distinct ones).

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

The square root of 20510226 is about 4528.8217010609. The cubic root of 20510226 is about 273.7306835685.

Adding to 20510226 its reverse (62201502), we get a palindrome (82711728).

It can be divided in two parts, 20510 and 226, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20510226 in words is "twenty million, five hundred ten thousand, two hundred twenty-six".