20130616 has 16 divisors (see below), whose sum is σ = 41176440. Its totient is φ = 9150240.

The previous prime is 20130599. The next prime is 20130647. The reversal of 20130616 is 61603102.

It is a junction number, because it is equal to n+sod(n) for n = 20130593 and 20130602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114291 + ... + 114466.

Almost surely, 2^20130616 is an apocalyptic number.

It is an amenable number.

20130616 is an abundant number, since it is smaller than the sum of its proper divisors (21045824).

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

20130616 is a wasteful number, since it uses less digits than its factorization.

20130616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228774 (or 228770 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20130616 is about 4486.7155024583. The cubic root of 20130616 is about 272.0313905525.

Adding to 20130616 its reverse (61603102), we get a palindrome (81733718).

The spelling of 20130616 in words is "twenty million, one hundred thirty thousand, six hundred sixteen".