20785930 has 32 divisors (see below), whose sum is σ = 41041728. Its totient is φ = 7516800.

The previous prime is 20785913. The next prime is 20785937. The reversal of 20785930 is 3958702.

It is not an unprimeable number, because it can be changed into a prime (20785937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25225 + ... + 26035.

It is an arithmetic number, because the mean of its divisors is an integer number (1282554).

Almost surely, 2^20785930 is an apocalyptic number.

20785930 is a deficient number, since it is larger than the sum of its proper divisors (20255798).

20785930 is a wasteful number, since it uses less digits than its factorization.

20785930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 20785930 is about 4559.1589136594. The cubic root of 20785930 is about 274.9517491103.

It can be divided in two parts, 2078 and 5930, that added together give a palindrome (8008).

The spelling of 20785930 in words is "twenty million, seven hundred eighty-five thousand, nine hundred thirty".