20548459 has 2 divisors, whose sum is σ = 20548460. Its totient is φ = 20548458.

The previous prime is 20548439. The next prime is 20548487. The reversal of 20548459 is 95484502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20548459 - 2⁷ = 20548331 is a prime.

It is not a weakly prime, because it can be changed into another prime (20548439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10274229 + 10274230.

It is an arithmetic number, because the mean of its divisors is an integer number (10274230).

Almost surely, 2^20548459 is an apocalyptic number.

20548459 is a deficient number, since it is larger than the sum of its proper divisors (1).

20548459 is an equidigital number, since it uses as much as digits as its factorization.

20548459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 20548459 is about 4533.0408116407. The cubic root of 20548459 is about 273.9006646149.

The spelling of 20548459 in words is "twenty million, five hundred forty-eight thousand, four hundred fifty-nine".