20550115087 has 2 divisors, whose sum is σ = 20550115088. Its totient is φ = 20550115086.

The previous prime is 20550115073. The next prime is 20550115123. The reversal of 20550115087 is 78051105502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20550115087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20550115387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10275057543 + 10275057544.

It is an arithmetic number, because the mean of its divisors is an integer number (10275057544).

Almost surely, 2^20550115087 is an apocalyptic number.

20550115087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20550115087 is an equidigital number, since it uses as much as digits as its factorization.

20550115087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14000, while the sum is 34.

The spelling of 20550115087 in words is "twenty billion, five hundred fifty million, one hundred fifteen thousand, eighty-seven".