20109020 has 24 divisors (see below), whose sum is σ = 42339024. Its totient is φ = 8022656.

The previous prime is 20109017. The next prime is 20109041. The reversal of 20109020 is 2090102.

It is a junction number, because it is equal to n+sod(n) for n = 20108986 and 20109004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8264 + ... + 10416.

It is an arithmetic number, because the mean of its divisors is an integer number (1764126).

Almost surely, 2^20109020 is an apocalyptic number.

20109020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20109020 is an abundant number, since it is smaller than the sum of its proper divisors (22230004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20109020 is a wasteful number, since it uses less digits than its factorization.

20109020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629 (or 2627 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 20109020 is about 4484.3081963665. The cubic root of 20109020 is about 271.9340778825.

Adding to 20109020 its reverse (2090102), we get a palindrome (22199122).

The spelling of 20109020 in words is "twenty million, one hundred nine thousand, twenty".