20108930 has 8 divisors (see below), whose sum is σ = 36196092. Its totient is φ = 8043568.

The previous prime is 20108917. The next prime is 20108939. The reversal of 20108930 is 3980102.

It can be written as a sum of positive squares in 2 ways, for example, as 18207289 + 1901641 = 4267^2 + 1379^2 .

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 = 20108896 and 20108905.

It is not an unprimeable number, because it can be changed into a prime (20108939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005437 + ... + 1005456.

Almost surely, 2^20108930 is an apocalyptic number.

20108930 is a deficient number, since it is larger than the sum of its proper divisors (16087162).

20108930 is a wasteful number, since it uses less digits than its factorization.

20108930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010900.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20108930 is about 4484.2981613626. The cubic root of 20108930 is about 271.9336721922.

The spelling of 20108930 in words is "twenty million, one hundred eight thousand, nine hundred thirty".