20306604287 has 2 divisors, whose sum is σ = 20306604288. Its totient is φ = 20306604286.

The previous prime is 20306604259. The next prime is 20306604299. The reversal of 20306604287 is 78240660302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20306604287 - 2¹⁰ = 20306603263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20306604287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20306600287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10153302143 + 10153302144.

It is an arithmetic number, because the mean of its divisors is an integer number (10153302144).

Almost surely, 2^20306604287 is an apocalyptic number.

20306604287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20306604287 is an equidigital number, since it uses as much as digits as its factorization.

20306604287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 20306604287 in words is "twenty billion, three hundred six million, six hundred four thousand, two hundred eighty-seven".