18285986351 has 2 divisors, whose sum is σ = 18285986352. Its totient is φ = 18285986350.

The previous prime is 18285986321. The next prime is 18285986357. The reversal of 18285986351 is 15368958281.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18285986351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18285986357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9142993175 + 9142993176.

It is an arithmetic number, because the mean of its divisors is an integer number (9142993176).

Almost surely, 2^18285986351 is an apocalyptic number.

18285986351 is a deficient number, since it is larger than the sum of its proper divisors (1).

18285986351 is an equidigital number, since it uses as much as digits as its factorization.

18285986351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4147200, while the sum is 56.

The spelling of 18285986351 in words is "eighteen billion, two hundred eighty-five million, nine hundred eighty-six thousand, three hundred fifty-one".