20009055 has 16 divisors (see below), whose sum is σ = 34925184. Its totient is φ = 9701280.

The previous prime is 20009053. The next prime is 20009113. The reversal of 20009055 is 55090002.

It is not a de Polignac number, because 20009055 - 2¹ = 20009053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20009053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60469 + ... + 60798.

It is an arithmetic number, because the mean of its divisors is an integer number (2182824).

Almost surely, 2^20009055 is an apocalyptic number.

20009055 is a deficient number, since it is larger than the sum of its proper divisors (14916129).

20009055 is a wasteful number, since it uses less digits than its factorization.

20009055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121286.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 20009055 is about 4473.1482202136. The cubic root of 20009055 is about 271.4827205646.

Adding to 20009055 its reverse (55090002), we get a palindrome (75099057).

The spelling of 20009055 in words is "twenty million, nine thousand, fifty-five".