20528671399 has 2 divisors, whose sum is σ = 20528671400. Its totient is φ = 20528671398.

The previous prime is 20528671357. The next prime is 20528671451. The reversal of 20528671399 is 99317682502.

It is an a-pointer prime, because the next prime (20528671451) can be obtained adding 20528671399 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20528671399 - 2¹⁹ = 20528147111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20528671309) 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 as a sum of consecutive naturals, namely, 10264335699 + 10264335700.

It is an arithmetic number, because the mean of its divisors is an integer number (10264335700).

Almost surely, 2^20528671399 is an apocalyptic number.

20528671399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20528671399 is an equidigital number, since it uses as much as digits as its factorization.

20528671399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 20528671399 in words is "twenty billion, five hundred twenty-eight million, six hundred seventy-one thousand, three hundred ninety-nine".