20548104061 has 4 divisors (see below), whose sum is σ = 20606981500. Its totient is φ = 20489226624.

The previous prime is 20548104043. The next prime is 20548104089. The reversal of 20548104061 is 16040184502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16040184502 = 2 ⋅8020092251.

It can be written as a sum of positive squares in 2 ways, for example, as 7070287225 + 13477816836 = 84085^2 + 116094^2 .

It is a cyclic number.

It is not a de Polignac number, because 20548104061 - 2¹⁵ = 20548071293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20548104001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29438196 + ... + 29438893.

It is an arithmetic number, because the mean of its divisors is an integer number (5151745375).

Almost surely, 2^20548104061 is an apocalyptic number.

It is an amenable number.

20548104061 is a deficient number, since it is larger than the sum of its proper divisors (58877439).

20548104061 is an equidigital number, since it uses as much as digits as its factorization.

20548104061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58877438.

The product of its (nonzero) digits is 7680, while the sum is 31.

Adding to 20548104061 its reverse (16040184502), we get a palindrome (36588288563).

It can be divided in two parts, 20548 and 104061, that added together give a square (124609 = 353²).

The spelling of 20548104061 in words is "twenty billion, five hundred forty-eight million, one hundred four thousand, sixty-one".