18064948477 has 2 divisors, whose sum is σ = 18064948478. Its totient is φ = 18064948476.

The previous prime is 18064948469. The next prime is 18064948537. The reversal of 18064948477 is 77484946081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9372369721 + 8692578756 = 96811^2 + 93234^2 .

It is a cyclic number.

It is not a de Polignac number, because 18064948477 - 2³ = 18064948469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18064946477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9032474238 + 9032474239.

It is an arithmetic number, because the mean of its divisors is an integer number (9032474239).

Almost surely, 2^18064948477 is an apocalyptic number.

It is an amenable number.

18064948477 is a deficient number, since it is larger than the sum of its proper divisors (1).

18064948477 is an equidigital number, since it uses as much as digits as its factorization.

18064948477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10838016, while the sum is 58.

The spelling of 18064948477 in words is "eighteen billion, sixty-four million, nine hundred forty-eight thousand, four hundred seventy-seven".