20830930 has 16 divisors (see below), whose sum is σ = 37715544. Its totient is φ = 8283520.

The previous prime is 20830907. The next prime is 20830937. The reversal of 20830930 is 3903802.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20331081 + 499849 = 4509^2 + 707^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20830895 and 20830904.

It is not an unprimeable number, because it can be changed into a prime (20830937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4291 + ... + 7750.

Almost surely, 2^20830930 is an apocalyptic number.

20830930 is a deficient number, since it is larger than the sum of its proper divisors (16884614).

20830930 is a wasteful number, since it uses less digits than its factorization.

20830930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12221.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20830930 is about 4564.0913663072. The cubic root of 20830930 is about 275.1500228252.

The spelling of 20830930 in words is "twenty million, eight hundred thirty thousand, nine hundred thirty".