20001321134 has 32 divisors (see below), whose sum is σ = 33189030720. Its totient is φ = 8992000512.

The previous prime is 20001321133. The next prime is 20001321149. The reversal of 20001321134 is 43112310002.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001321133) 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, 632852 + ... + 663704.

It is an arithmetic number, because the mean of its divisors is an integer number (1037157210).

Almost surely, 2^20001321134 is an apocalyptic number.

20001321134 is a deficient number, since it is larger than the sum of its proper divisors (13187709586).

20001321134 is a wasteful number, since it uses less digits than its factorization.

20001321134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31724.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20001321134 its reverse (43112310002), we get a palindrome (63113631136).

The spelling of 20001321134 in words is "twenty billion, one million, three hundred twenty-one thousand, one hundred thirty-four".