20118511087 has 2 divisors, whose sum is σ = 20118511088. Its totient is φ = 20118511086.

The previous prime is 20118511027. The next prime is 20118511117. The reversal of 20118511087 is 78011581102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20118511087 - 2⁷ = 20118510959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20118511027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10059255543 + 10059255544.

It is an arithmetic number, because the mean of its divisors is an integer number (10059255544).

Almost surely, 2^20118511087 is an apocalyptic number.

20118511087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20118511087 is an equidigital number, since it uses as much as digits as its factorization.

20118511087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 34.

The spelling of 20118511087 in words is "twenty billion, one hundred eighteen million, five hundred eleven thousand, eighty-seven".