20326728 has 32 divisors (see below), whose sum is σ = 51579360. Its totient is φ = 6673920.

The previous prime is 20326723. The next prime is 20326759. The reversal of 20326728 is 82762302.

It is a junction number, because it is equal to n+sod(n) for n = 20326695 and 20326704.

It is not an unprimeable number, because it can be changed into a prime (20326721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4713 + ... + 7928.

It is an arithmetic number, because the mean of its divisors is an integer number (1611855).

Almost surely, 2^20326728 is an apocalyptic number.

It is an amenable number.

20326728 is an abundant number, since it is smaller than the sum of its proper divisors (31252632).

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

20326728 is a wasteful number, since it uses less digits than its factorization.

20326728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12717 (or 12713 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20326728 is about 4508.5172728958. The cubic root of 20326728 is about 272.9119118985.

The spelling of 20326728 in words is "twenty million, three hundred twenty-six thousand, seven hundred twenty-eight".