20830225 has 24 divisors (see below), whose sum is σ = 28123200. Its totient is φ = 15213120.

The previous prime is 20830217. The next prime is 20830237. The reversal of 20830225 is 52203802.

It is not a de Polignac number, because 20830225 - 2³ = 20830217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20830196 and 20830205.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34476 + ... + 35074.

It is an arithmetic number, because the mean of its divisors is an integer number (1171800).

Almost surely, 2^20830225 is an apocalyptic number.

20830225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20830225 is a deficient number, since it is larger than the sum of its proper divisors (7292975).

20830225 is a wasteful number, since it uses less digits than its factorization.

20830225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20830225 is about 4564.0141323182. The cubic root of 20830225 is about 275.1469187399.

The spelling of 20830225 in words is "twenty million, eight hundred thirty thousand, two hundred twenty-five".