20555760547 has 4 divisors (see below), whose sum is σ = 23492297776. Its totient is φ = 17619223320.

The previous prime is 20555760517. The next prime is 20555760557. The reversal of 20555760547 is 74506755502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74506755502 = 2 ⋅37253377751.

It is a cyclic number.

It is not a de Polignac number, because 20555760547 - 2¹⁵ = 20555727779 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20555760497 and 20555760506.

It is not an unprimeable number, because it can be changed into a prime (20555760517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1468268604 + ... + 1468268617.

It is an arithmetic number, because the mean of its divisors is an integer number (5873074444).

Almost surely, 2^20555760547 is an apocalyptic number.

20555760547 is a deficient number, since it is larger than the sum of its proper divisors (2936537229).

20555760547 is an equidigital number, since it uses as much as digits as its factorization.

20555760547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936537228.

The product of its (nonzero) digits is 1470000, while the sum is 46.

The spelling of 20555760547 in words is "twenty billion, five hundred fifty-five million, seven hundred sixty thousand, five hundred forty-seven".