18285278087 has 2 divisors, whose sum is σ = 18285278088. Its totient is φ = 18285278086.

The previous prime is 18285278051. The next prime is 18285278101. The reversal of 18285278087 is 78087258281.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18285278087 - 2⁸ = 18285277831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18285278887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9142639043 + 9142639044.

It is an arithmetic number, because the mean of its divisors is an integer number (9142639044).

Almost surely, 2^18285278087 is an apocalyptic number.

18285278087 is a deficient number, since it is larger than the sum of its proper divisors (1).

18285278087 is an equidigital number, since it uses as much as digits as its factorization.

18285278087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4014080, while the sum is 56.

The spelling of 18285278087 in words is "eighteen billion, two hundred eighty-five million, two hundred seventy-eight thousand, eighty-seven".