18420210135527 has 2 divisors, whose sum is σ = 18420210135528. Its totient is φ = 18420210135526.

The previous prime is 18420210135469. The next prime is 18420210135617. The reversal of 18420210135527 is 72553101202481.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (72553101202481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18420210135527 - 2³⁶ = 18351490658791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18420210135127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9210105067763 + 9210105067764.

It is an arithmetic number, because the mean of its divisors is an integer number (9210105067764).

Almost surely, 2^{18420210135527} is an apocalyptic number.

18420210135527 is a deficient number, since it is larger than the sum of its proper divisors (1).

18420210135527 is an equidigital number, since it uses as much as digits as its factorization.

18420210135527 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 18420210135527 in words is "eighteen trillion, four hundred twenty billion, two hundred ten million, one hundred thirty-five thousand, five hundred twenty-seven".