20871230 has 8 divisors (see below), whose sum is σ = 37568232. Its totient is φ = 8348488.

The previous prime is 20871229. The next prime is 20871251. The reversal of 20871230 is 3217802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20871196 and 20871205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1043552 + ... + 1043571.

It is an arithmetic number, because the mean of its divisors is an integer number (4696029).

Almost surely, 2^20871230 is an apocalyptic number.

20871230 is a deficient number, since it is larger than the sum of its proper divisors (16697002).

20871230 is a wasteful number, since it uses less digits than its factorization.

20871230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2087130.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20871230 is about 4568.5041315512. The cubic root of 20871230 is about 275.3273457272.

The spelling of 20871230 in words is "twenty million, eight hundred seventy-one thousand, two hundred thirty".