20555827 has 2 divisors, whose sum is σ = 20555828. Its totient is φ = 20555826.

The previous prime is 20555819. The next prime is 20555897. The reversal of 20555827 is 72855502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20555827 - 2³ = 20555819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20555792 and 20555801.

It is not a weakly prime, because it can be changed into another prime (20555897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10277913 + 10277914.

It is an arithmetic number, because the mean of its divisors is an integer number (10277914).

Almost surely, 2^20555827 is an apocalyptic number.

20555827 is a deficient number, since it is larger than the sum of its proper divisors (1).

20555827 is an equidigital number, since it uses as much as digits as its factorization.

20555827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 20555827 is about 4533.8534383017. The cubic root of 20555827 is about 273.9333979525.

The spelling of 20555827 in words is "twenty million, five hundred fifty-five thousand, eight hundred twenty-seven".