20830617 has 24 divisors (see below), whose sum is σ = 31734144. Its totient is φ = 13140864.

The previous prime is 20830609. The next prime is 20830633. The reversal of 20830617 is 71603802.

It is not a de Polignac number, because 20830617 - 2³ = 20830609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20830637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20833 + ... + 21809.

It is an arithmetic number, because the mean of its divisors is an integer number (1322256).

Almost surely, 2^20830617 is an apocalyptic number.

It is an amenable number.

20830617 is a deficient number, since it is larger than the sum of its proper divisors (10903527).

20830617 is a wasteful number, since it uses less digits than its factorization.

20830617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109 (or 1106 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 20830617 is about 4564.0570767684. The cubic root of 20830617 is about 275.1486447080.

The spelling of 20830617 in words is "twenty million, eight hundred thirty thousand, six hundred seventeen".