20548679 has 2 divisors, whose sum is σ = 20548680. Its totient is φ = 20548678.

The previous prime is 20548673. The next prime is 20548681. The reversal of 20548679 is 97684502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20548679 is a prime.

Together with 20548681, 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 (20548673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10274339 + 10274340.

It is an arithmetic number, because the mean of its divisors is an integer number (10274340).

Almost surely, 2^20548679 is an apocalyptic number.

20548679 is a deficient number, since it is larger than the sum of its proper divisors (1).

20548679 is an equidigital number, since it uses as much as digits as its factorization.

20548679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 20548679 is about 4533.0650778474. The cubic root of 20548679 is about 273.9016421080.

It can be divided in two parts, 205 and 48679, that added together give a palindrome (48884).

The spelling of 20548679 in words is "twenty million, five hundred forty-eight thousand, six hundred seventy-nine".