20213111134 has 4 divisors (see below), whose sum is σ = 30319666704. Its totient is φ = 10106555566.

The previous prime is 20213111111. The next prime is 20213111147. The reversal of 20213111134 is 43111131202.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5053277782 + ... + 5053277785.

It is an arithmetic number, because the mean of its divisors is an integer number (7579916676).

Almost surely, 2^20213111134 is an apocalyptic number.

20213111134 is a deficient number, since it is larger than the sum of its proper divisors (10106555570).

20213111134 is a wasteful number, since it uses less digits than its factorization.

20213111134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10106555569.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20213111134 its reverse (43111131202), we get a palindrome (63324242336).

The spelling of 20213111134 in words is "twenty billion, two hundred thirteen million, one hundred eleven thousand, one hundred thirty-four".