20113134155 has 4 divisors (see below), whose sum is σ = 24135760992. Its totient is φ = 16090507320.

The previous prime is 20113134131. The next prime is 20113134157. The reversal of 20113134155 is 55143131102.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20113134155 - 2¹⁸ = 20112872011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20113134157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011313411 + ... + 2011313420.

It is an arithmetic number, because the mean of its divisors is an integer number (6033940248).

Almost surely, 2^20113134155 is an apocalyptic number.

20113134155 is a deficient number, since it is larger than the sum of its proper divisors (4022626837).

20113134155 is an equidigital number, since it uses as much as digits as its factorization.

20113134155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022626836.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 20113134155 its reverse (55143131102), we get a palindrome (75256265257).

The spelling of 20113134155 in words is "twenty billion, one hundred thirteen million, one hundred thirty-four thousand, one hundred fifty-five".