20306323928 has 64 divisors (see below), whose sum is σ = 42018462720. Its totient is φ = 9123206400.

The previous prime is 20306323907. The next prime is 20306323937. The reversal of 20306323928 is 82932360302.

It is a junction number, because it is equal to n+sod(n) for n = 20306323891 and 20306323900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5590673 + ... + 5594303.

It is an arithmetic number, because the mean of its divisors is an integer number (656538480).

Almost surely, 2^20306323928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20306323928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21009231360).

20306323928 is an abundant number, since it is smaller than the sum of its proper divisors (21712138792).

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

20306323928 is a wasteful number, since it uses less digits than its factorization.

20306323928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4368 (or 4364 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The spelling of 20306323928 in words is "twenty billion, three hundred six million, three hundred twenty-three thousand, nine hundred twenty-eight".