18620120287 has 2 divisors, whose sum is σ = 18620120288. Its totient is φ = 18620120286.

The previous prime is 18620120261. The next prime is 18620120339. The reversal of 18620120287 is 78202102681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18620120287 - 2²⁷ = 18485902559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18620120227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9310060143 + 9310060144.

It is an arithmetic number, because the mean of its divisors is an integer number (9310060144).

Almost surely, 2^18620120287 is an apocalyptic number.

18620120287 is a deficient number, since it is larger than the sum of its proper divisors (1).

18620120287 is an equidigital number, since it uses as much as digits as its factorization.

18620120287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 37.

The spelling of 18620120287 in words is "eighteen billion, six hundred twenty million, one hundred twenty thousand, two hundred eighty-seven".