20160320 has 42 divisors (see below), whose sum is σ = 48198786. Its totient is φ = 8032000.

The previous prime is 20160319. The next prime is 20160341. The reversal of 20160320 is 2306102.

It can be written as a sum of positive squares in only one way, i.e., 16128256 + 4032064 = 4016^2 + 2008^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20160295 and 20160304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80195 + ... + 80445.

Almost surely, 2^20160320 is an apocalyptic number.

20160320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20160320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24099393).

20160320 is an abundant number, since it is smaller than the sum of its proper divisors (28038466).

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

20160320 is an frugal number, since it uses more digits than its factorization.

20160320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20160320 is about 4490.0244988196. The cubic root of 20160320 is about 272.1651246500.

Adding to 20160320 its reverse (2306102), we get a palindrome (22466422).

The spelling of 20160320 in words is "twenty million, one hundred sixty thousand, three hundred twenty".