20109602 has 8 divisors (see below), whose sum is σ = 30577836. Its totient is φ = 9916992.

The previous prime is 20109601. The next prime is 20109629. The reversal of 20109602 is 20690102.

It can be written as a sum of positive squares in 2 ways, for example, as 19971961 + 137641 = 4469^2 + 371^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20109601) 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, 68723 + ... + 69014.

Almost surely, 2^20109602 is an apocalyptic number.

20109602 is a deficient number, since it is larger than the sum of its proper divisors (10468234).

20109602 is a wasteful number, since it uses less digits than its factorization.

20109602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137812.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 20109602 is about 4484.3730888498. The cubic root of 20109602 is about 271.9367013173.

Adding to 20109602 its reverse (20690102), we get a palindrome (40799704).

The spelling of 20109602 in words is "twenty million, one hundred nine thousand, six hundred two".