20605034134 has 4 divisors (see below), whose sum is σ = 30907551204. Its totient is φ = 10302517066.

The previous prime is 20605034123. The next prime is 20605034167. The reversal of 20605034134 is 43143050602.

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, 5151258532 + ... + 5151258535.

It is an arithmetic number, because the mean of its divisors is an integer number (7726887801).

Almost surely, 2^20605034134 is an apocalyptic number.

20605034134 is a deficient number, since it is larger than the sum of its proper divisors (10302517070).

20605034134 is a wasteful number, since it uses less digits than its factorization.

20605034134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10302517069.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 20605034134 its reverse (43143050602), we get a palindrome (63748084736).

The spelling of 20605034134 in words is "twenty billion, six hundred five million, thirty-four thousand, one hundred thirty-four".