20100630 has 64 divisors (see below), whose sum is σ = 55738368. Its totient is φ = 4584960.

The previous prime is 20100629. The next prime is 20100673. The reversal of 20100630 is 3600102.

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, 3819 + ... + 7401.

It is an arithmetic number, because the mean of its divisors is an integer number (870912).

Almost surely, 2^20100630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20100630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27869184).

20100630 is an abundant number, since it is smaller than the sum of its proper divisors (35637738).

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

20100630 is a wasteful number, since it uses less digits than its factorization.

20100630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20100630 is about 4483.3726144500. The cubic root of 20100630 is about 271.8962533260.

Adding to 20100630 its reverse (3600102), we get a palindrome (23700732).

The spelling of 20100630 in words is "twenty million, one hundred thousand, six hundred thirty".