20127045 has 16 divisors (see below), whose sum is σ = 32889600. Its totient is φ = 10505664.

The previous prime is 20127043. The next prime is 20127109. The reversal of 20127045 is 54072102.

It is not a de Polignac number, because 20127045 - 2¹ = 20127043 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20127043) 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, 13570 + ... + 14979.

It is an arithmetic number, because the mean of its divisors is an integer number (2055600).

Almost surely, 2^20127045 is an apocalyptic number.

It is an amenable number.

20127045 is a deficient number, since it is larger than the sum of its proper divisors (12762555).

20127045 is a wasteful number, since it uses less digits than its factorization.

20127045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28604.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 20127045 is about 4486.3175322306. The cubic root of 20127045 is about 272.0153042499.

Adding to 20127045 its reverse (54072102), we get a palindrome (74199147).

The spelling of 20127045 in words is "twenty million, one hundred twenty-seven thousand, forty-five".