20531775134 has 32 divisors (see below), whose sum is σ = 34355754720. Its totient is φ = 9137342592.

The previous prime is 20531775133. The next prime is 20531775181. The reversal of 20531775134 is 43157713502.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20531775133) 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 15 ways as a sum of consecutive naturals, for example, 565229 + ... + 600455.

It is an arithmetic number, because the mean of its divisors is an integer number (1073617335).

Almost surely, 2^20531775134 is an apocalyptic number.

20531775134 is a deficient number, since it is larger than the sum of its proper divisors (13823979586).

20531775134 is a wasteful number, since it uses less digits than its factorization.

20531775134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36044.

The product of its (nonzero) digits is 88200, while the sum is 38.

The spelling of 20531775134 in words is "twenty billion, five hundred thirty-one million, seven hundred seventy-five thousand, one hundred thirty-four".