20326306 has 72 divisors (see below), whose sum is σ = 42057792. Its totient is φ = 7207200.

The previous prime is 20326291. The next prime is 20326307. The reversal of 20326306 is 60362302.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (20326307) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 286251 + ... + 286321.

It is an arithmetic number, because the mean of its divisors is an integer number (584136).

Almost surely, 2^20326306 is an apocalyptic number.

20326306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20326306 is an abundant number, since it is smaller than the sum of its proper divisors (21731486).

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

20326306 is a wasteful number, since it uses less digits than its factorization.

20326306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 20326306 is about 4508.4704723443. The cubic root of 20326306 is about 272.9100232583.

Adding to 20326306 its reverse (60362302), we get a palindrome (80688608).

It can be divided in two parts, 2032 and 6306, that added together give a palindrome (8338).

The spelling of 20326306 in words is "twenty million, three hundred twenty-six thousand, three hundred six".