20134223047 has 4 divisors (see below), whose sum is σ = 20246704920. Its totient is φ = 20021741176.

The previous prime is 20134223033. The next prime is 20134223099. The reversal of 20134223047 is 74032243102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20134223047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20134223017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56240668 + ... + 56241025.

It is an arithmetic number, because the mean of its divisors is an integer number (5061676230).

Almost surely, 2^20134223047 is an apocalyptic number.

20134223047 is a deficient number, since it is larger than the sum of its proper divisors (112481873).

20134223047 is a wasteful number, since it uses less digits than its factorization.

20134223047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112481872.

The product of its (nonzero) digits is 8064, while the sum is 28.

Adding to 20134223047 its reverse (74032243102), we get a palindrome (94166466149).

The spelling of 20134223047 in words is "twenty billion, one hundred thirty-four million, two hundred twenty-three thousand, forty-seven".