20548613 has 2 divisors, whose sum is σ = 20548614. Its totient is φ = 20548612.

The previous prime is 20548573. The next prime is 20548639. The reversal of 20548613 is 31684502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15382084 + 5166529 = 3922^2 + 2273^2 .

It is a cyclic number.

It is not a de Polignac number, because 20548613 - 2²² = 16354309 is a prime.

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, 10274306 + 10274307.

It is an arithmetic number, because the mean of its divisors is an integer number (10274307).

Almost surely, 2^20548613 is an apocalyptic number.

It is an amenable number.

20548613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20548613 is an equidigital number, since it uses as much as digits as its factorization.

20548613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 20548613 is about 4533.0577979991. The cubic root of 20548613 is about 273.9013488608.

The spelling of 20548613 in words is "twenty million, five hundred forty-eight thousand, six hundred thirteen".