20677207087 has 2 divisors, whose sum is σ = 20677207088. Its totient is φ = 20677207086.

The previous prime is 20677207081. The next prime is 20677207157. The reversal of 20677207087 is 78070277602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20677207087 - 2⁷ = 20677206959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20677207081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10338603543 + 10338603544.

It is an arithmetic number, because the mean of its divisors is an integer number (10338603544).

Almost surely, 2^20677207087 is an apocalyptic number.

20677207087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20677207087 is an equidigital number, since it uses as much as digits as its factorization.

20677207087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460992, while the sum is 46.

The spelling of 20677207087 in words is "twenty billion, six hundred seventy-seven million, two hundred seven thousand, eighty-seven".