20100616 has 16 divisors (see below), whose sum is σ = 38063340. Its totient is φ = 9950400.

The previous prime is 20100611. The next prime is 20100629. The reversal of 20100616 is 61600102.

It can be written as a sum of positive squares in 2 ways, for example, as 19980900 + 119716 = 4470^2 + 346^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20100616.

It is not an unprimeable number, because it can be changed into a prime (20100611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11631 + ... + 13246.

Almost surely, 2^20100616 is an apocalyptic number.

It is an amenable number.

20100616 is a deficient number, since it is larger than the sum of its proper divisors (17962724).

20100616 is a wasteful number, since it uses less digits than its factorization.

20100616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24984 (or 24980 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 20100616 is about 4483.3710531251. The cubic root of 20100616 is about 271.8961902011.

Adding to 20100616 its reverse (61600102), we get a palindrome (81700718).

The spelling of 20100616 in words is "twenty million, one hundred thousand, six hundred sixteen".