20581384410527 has 2 divisors, whose sum is σ = 20581384410528. Its totient is φ = 20581384410526.

The previous prime is 20581384410481. The next prime is 20581384410539. The reversal of 20581384410527 is 72501448318502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20581384410527 - 2¹⁶ = 20581384344991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20581384410427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10290692205263 + 10290692205264.

It is an arithmetic number, because the mean of its divisors is an integer number (10290692205264).

Almost surely, 2^{20581384410527} is an apocalyptic number.

20581384410527 is a deficient number, since it is larger than the sum of its proper divisors (1).

20581384410527 is an equidigital number, since it uses as much as digits as its factorization.

20581384410527 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2150400, while the sum is 50.

The spelling of 20581384410527 in words is "twenty trillion, five hundred eighty-one billion, three hundred eighty-four million, four hundred ten thousand, five hundred twenty-seven".