20548511 has 2 divisors, whose sum is σ = 20548512. Its totient is φ = 20548510.

The previous prime is 20548487. The next prime is 20548513. The reversal of 20548511 is 11584502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20548511 - 2¹⁸ = 20286367 is a prime.

Together with 20548513, 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 (20548513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10274255 + 10274256.

It is an arithmetic number, because the mean of its divisors is an integer number (10274256).

Almost surely, 2^20548511 is an apocalyptic number.

20548511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20548511 is an equidigital number, since it uses as much as digits as its factorization.

20548511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 20548511 is about 4533.0465473013. The cubic root of 20548511 is about 273.9008956593.

The spelling of 20548511 in words is "twenty million, five hundred forty-eight thousand, five hundred eleven".