20852830 has 16 divisors (see below), whose sum is σ = 38550240. Its totient is φ = 8115552.

The previous prime is 20852809. The next prime is 20852831. The reversal of 20852830 is 3825802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20852831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27810 + ... + 28549.

It is an arithmetic number, because the mean of its divisors is an integer number (2409390).

Almost surely, 2^20852830 is an apocalyptic number.

20852830 is a deficient number, since it is larger than the sum of its proper divisors (17697410).

20852830 is a wasteful number, since it uses less digits than its factorization.

20852830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56403.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 20852830 is about 4566.4898992552. The cubic root of 20852830 is about 275.2464127456.

The spelling of 20852830 in words is "twenty million, eight hundred fifty-two thousand, eight hundred thirty".