18027902551 has 2 divisors, whose sum is σ = 18027902552. Its totient is φ = 18027902550.

The previous prime is 18027902549. The next prime is 18027902561. The reversal of 18027902551 is 15520972081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18027902551 - 2¹ = 18027902549 is a prime.

Together with 18027902549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18027902561) 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, 9013951275 + 9013951276.

It is an arithmetic number, because the mean of its divisors is an integer number (9013951276).

Almost surely, 2^18027902551 is an apocalyptic number.

18027902551 is a deficient number, since it is larger than the sum of its proper divisors (1).

18027902551 is an equidigital number, since it uses as much as digits as its factorization.

18027902551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 40.

The spelling of 18027902551 in words is "eighteen billion, twenty-seven million, nine hundred two thousand, five hundred fifty-one".