20021044134 has 64 divisors (see below), whose sum is σ = 49743300096. Its totient is φ = 5230911744.

The previous prime is 20021044103. The next prime is 20021044151. The reversal of 20021044134 is 43144012002.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20021044134.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 112927 + ... + 229770.

It is an arithmetic number, because the mean of its divisors is an integer number (777239064).

Almost surely, 2^20021044134 is an apocalyptic number.

20021044134 is an abundant number, since it is smaller than the sum of its proper divisors (29722255962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20021044134 is a wasteful number, since it uses less digits than its factorization.

20021044134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342829.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20021044134 its reverse (43144012002), we get a palindrome (63165056136).

The spelling of 20021044134 in words is "twenty billion, twenty-one million, forty-four thousand, one hundred thirty-four".