20130655 has 4 divisors (see below), whose sum is σ = 24156792. Its totient is φ = 16104520.

The previous prime is 20130653. The next prime is 20130683. The reversal of 20130655 is 55603102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55603102 = 2 ⋅27801551.

It is not a de Polignac number, because 20130655 - 2¹ = 20130653 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2013061 + ... + 2013070.

It is an arithmetic number, because the mean of its divisors is an integer number (6039198).

Almost surely, 2^20130655 is an apocalyptic number.

20130655 is a deficient number, since it is larger than the sum of its proper divisors (4026137).

20130655 is an equidigital number, since it uses as much as digits as its factorization.

20130655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026136.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 20130655 is about 4486.7198486199. The cubic root of 20130655 is about 272.0315662255.

Adding to 20130655 its reverse (55603102), we get a palindrome (75733757).

The spelling of 20130655 in words is "twenty million, one hundred thirty thousand, six hundred fifty-five".