20546137679 has 2 divisors, whose sum is σ = 20546137680. Its totient is φ = 20546137678.

The previous prime is 20546137621. The next prime is 20546137681. The reversal of 20546137679 is 97673164502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20546137679 is a prime.

Together with 20546137681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20546137699) 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 as a sum of consecutive naturals, namely, 10273068839 + 10273068840.

It is an arithmetic number, because the mean of its divisors is an integer number (10273068840).

Almost surely, 2^20546137679 is an apocalyptic number.

20546137679 is a deficient number, since it is larger than the sum of its proper divisors (1).

20546137679 is an equidigital number, since it uses as much as digits as its factorization.

20546137679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 50.

The spelling of 20546137679 in words is "twenty billion, five hundred forty-six million, one hundred thirty-seven thousand, six hundred seventy-nine".