20087109 has 48 divisors (see below), whose sum is σ = 35235200. Its totient is φ = 11430720.

The previous prime is 20087083. The next prime is 20087131. The reversal of 20087109 is 90178002.

It is not a de Polignac number, because 20087109 - 2¹¹ = 20085061 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20082109) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83229 + ... + 83469.

Almost surely, 2^20087109 is an apocalyptic number.

It is an amenable number.

20087109 is a deficient number, since it is larger than the sum of its proper divisors (15148091).

20087109 is an frugal number, since it uses more digits than its factorization.

20087109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 20087109 is about 4481.8644557818. The cubic root of 20087109 is about 271.8352745762.

The spelling of 20087109 in words is "twenty million, eighty-seven thousand, one hundred nine".