20215115611005 has 16 divisors (see below), whose sum is σ = 36964782831744. Its totient is φ = 9241195707840.

The previous prime is 20215115611003. The next prime is 20215115611043. The reversal of 20215115611005 is 50011651151202.

It is not a de Polignac number, because 20215115611005 - 2¹ = 20215115611003 is a prime.

It is a super-2 number, since 2×20215115611005² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20215115611003) 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, 96262455186 + ... + 96262455395.

It is an arithmetic number, because the mean of its divisors is an integer number (2310298926984).

Almost surely, 2^{20215115611005} is an apocalyptic number.

It is an amenable number.

20215115611005 is a deficient number, since it is larger than the sum of its proper divisors (16749667220739).

20215115611005 is a wasteful number, since it uses less digits than its factorization.

20215115611005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192524910596.

The product of its (nonzero) digits is 3000, while the sum is 30.

Adding to 20215115611005 its reverse (50011651151202), we get a palindrome (70226766762207).

The spelling of 20215115611005 in words is "twenty trillion, two hundred fifteen billion, one hundred fifteen million, six hundred eleven thousand, five".