20830684 has 18 divisors (see below), whose sum is σ = 42405720. Its totient is φ = 8927352.

The previous prime is 20830681. The next prime is 20830721. The reversal of 20830684 is 48603802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20830681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52944 + ... + 53335.

Almost surely, 2^20830684 is an apocalyptic number.

It is an amenable number.

20830684 is an abundant number, since it is smaller than the sum of its proper divisors (21575036).

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

20830684 is a wasteful number, since it uses less digits than its factorization.

20830684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106297 (or 106288 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 20830684 is about 4564.0644167233. The cubic root of 20830684 is about 275.1489397055.

The spelling of 20830684 in words is "twenty million, eight hundred thirty thousand, six hundred eighty-four".