20160630 has 64 divisors (see below), whose sum is σ = 61447680. Its totient is φ = 4607712.

The previous prime is 20160611. The next prime is 20160661. The reversal of 20160630 is 3606102.

It is a happy number.

20160630 is a `hidden beast` number, since 20 + 16 + 0 + 630 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3444 + ... + 7223.

It is an arithmetic number, because the mean of its divisors is an integer number (960120).

Almost surely, 2^20160630 is an apocalyptic number.

20160630 is an abundant number, since it is smaller than the sum of its proper divisors (41287050).

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

20160630 is a wasteful number, since it uses less digits than its factorization.

20160630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10690 (or 10684 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20160630 is about 4490.0590196566. The cubic root of 20160630 is about 272.1665196470.

Adding to 20160630 its reverse (3606102), we get a palindrome (23766732).

The spelling of 20160630 in words is "twenty million, one hundred sixty thousand, six hundred thirty".