20803305587 has 2 divisors, whose sum is σ = 20803305588. Its totient is φ = 20803305586.

The previous prime is 20803305583. The next prime is 20803305629. The reversal of 20803305587 is 78550330802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20803305587 - 2² = 20803305583 is a prime.

It is a super-2 number, since 2×20803305587² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20803305583) 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, 10401652793 + 10401652794.

It is an arithmetic number, because the mean of its divisors is an integer number (10401652794).

Almost surely, 2^20803305587 is an apocalyptic number.

20803305587 is a deficient number, since it is larger than the sum of its proper divisors (1).

20803305587 is an equidigital number, since it uses as much as digits as its factorization.

20803305587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 20803305587 in words is "twenty billion, eight hundred three million, three hundred five thousand, five hundred eighty-seven".