20134145643 has 16 divisors (see below), whose sum is σ = 27518378496. Its totient is φ = 13086768960.

The previous prime is 20134145641. The next prime is 20134145671. The reversal of 20134145643 is 34654143102.

It is a happy number.

It is not a de Polignac number, because 20134145643 - 2¹ = 20134145641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20134145641) 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, 136746 + ... + 242832.

It is an arithmetic number, because the mean of its divisors is an integer number (1719898656).

Almost surely, 2^20134145643 is an apocalyptic number.

20134145643 is a deficient number, since it is larger than the sum of its proper divisors (7384232853).

20134145643 is a wasteful number, since it uses less digits than its factorization.

20134145643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107674.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 20134145643 its reverse (34654143102), we get a palindrome (54788288745).

The spelling of 20134145643 in words is "twenty billion, one hundred thirty-four million, one hundred forty-five thousand, six hundred forty-three".