20109200 has 30 divisors (see below), whose sum is σ = 48313314. Its totient is φ = 8043520.

The previous prime is 20109197. The next prime is 20109211. The reversal of 20109200 is 290102.

It can be written as a sum of positive squares in 3 ways, for example, as 1893376 + 18215824 = 1376^2 + 4268^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24737 + ... + 25536.

Almost surely, 2^20109200 is an apocalyptic number.

20109200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20109200 is an abundant number, since it is smaller than the sum of its proper divisors (28204114).

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

20109200 is a wasteful number, since it uses less digits than its factorization.

20109200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50291 (or 50280 counting only the distinct ones).

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

The square root of 20109200 is about 4484.3282663070. The cubic root of 20109200 is about 271.9348892595.

Adding to 20109200 its reverse (290102), we get a palindrome (20399302).

The spelling of 20109200 in words is "twenty million, one hundred nine thousand, two hundred".