20587482857 has 2 divisors, whose sum is σ = 20587482858. Its totient is φ = 20587482856.

The previous prime is 20587482847. The next prime is 20587482913. The reversal of 20587482857 is 75828478502.

It is an a-pointer prime, because the next prime (20587482913) can be obtained adding 20587482857 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18684429481 + 1903053376 = 136691^2 + 43624^2 .

It is a cyclic number.

It is not a de Polignac number, because 20587482857 - 2³⁴ = 3407613673 is a prime.

It is not a weakly prime, because it can be changed into another prime (20587482847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10293741428 + 10293741429.

It is an arithmetic number, because the mean of its divisors is an integer number (10293741429).

Almost surely, 2^20587482857 is an apocalyptic number.

It is an amenable number.

20587482857 is a deficient number, since it is larger than the sum of its proper divisors (1).

20587482857 is an equidigital number, since it uses as much as digits as its factorization.

20587482857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10035200, while the sum is 56.

The spelling of 20587482857 in words is "twenty billion, five hundred eighty-seven million, four hundred eighty-two thousand, eight hundred fifty-seven".