20672686087 has 2 divisors, whose sum is σ = 20672686088. Its totient is φ = 20672686086.

The previous prime is 20672686079. The next prime is 20672686159. The reversal of 20672686087 is 78068627602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20672686087 - 2³ = 20672686079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20672686187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10336343043 + 10336343044.

It is an arithmetic number, because the mean of its divisors is an integer number (10336343044).

Almost surely, 2^20672686087 is an apocalyptic number.

20672686087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20672686087 is an equidigital number, since it uses as much as digits as its factorization.

20672686087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 20672686087 in words is "twenty billion, six hundred seventy-two million, six hundred eighty-six thousand, eighty-seven".