20011150105 has 4 divisors (see below), whose sum is σ = 24013380132. Its totient is φ = 16008920080.

The previous prime is 20011150091. The next prime is 20011150127. The reversal of 20011150105 is 50105111002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50105111002 = 2 ⋅25052555501.

It can be written as a sum of positive squares in 2 ways, for example, as 12777137296 + 7234012809 = 113036^2 + 85053^2 .

It is not a de Polignac number, because 20011150105 - 2²³ = 20002761497 is a prime.

It is a super-2 number, since 2×20011150105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2001115006 + ... + 2001115015.

It is an arithmetic number, because the mean of its divisors is an integer number (6003345033).

Almost surely, 2^20011150105 is an apocalyptic number.

It is an amenable number.

20011150105 is a deficient number, since it is larger than the sum of its proper divisors (4002230027).

20011150105 is an equidigital number, since it uses as much as digits as its factorization.

20011150105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002230026.

The product of its (nonzero) digits is 50, while the sum is 16.

Adding to 20011150105 its reverse (50105111002), we get a palindrome (70116261107).

The spelling of 20011150105 in words is "twenty billion, eleven million, one hundred fifty thousand, one hundred five".