20120426330647 has 4 divisors (see below), whose sum is σ = 20167109454816. Its totient is φ = 20073743206480.

The previous prime is 20120426330611. The next prime is 20120426330659. The reversal of 20120426330647 is 74603362402102.

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-20120426330647 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 (20120426330687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23341561438 + ... + 23341562299.

It is an arithmetic number, because the mean of its divisors is an integer number (5041777363704).

Almost surely, 2^{20120426330647} is an apocalyptic number.

20120426330647 is a deficient number, since it is larger than the sum of its proper divisors (46683124169).

20120426330647 is an equidigital number, since it uses as much as digits as its factorization.

20120426330647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46683124168.

The product of its (nonzero) digits is 290304, while the sum is 40.

Adding to 20120426330647 its reverse (74603362402102), we get a palindrome (94723788732749).

The spelling of 20120426330647 in words is "twenty trillion, one hundred twenty billion, four hundred twenty-six million, three hundred thirty thousand, six hundred forty-seven".