20683289087 has 2 divisors, whose sum is σ = 20683289088. Its totient is φ = 20683289086.

The previous prime is 20683289083. The next prime is 20683289113. The reversal of 20683289087 is 78098238602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20683289087 - 2² = 20683289083 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20683289083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10341644543 + 10341644544.

It is an arithmetic number, because the mean of its divisors is an integer number (10341644544).

Almost surely, 2^20683289087 is an apocalyptic number.

20683289087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20683289087 is an equidigital number, since it uses as much as digits as its factorization.

20683289087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 20683289087 in words is "twenty billion, six hundred eighty-three million, two hundred eighty-nine thousand, eighty-seven".