18788407841473 has 2 divisors, whose sum is σ = 18788407841474. Its totient is φ = 18788407841472.

The previous prime is 18788407841461. The next prime is 18788407841477. The reversal of 18788407841473 is 37414870488781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18087090363664 + 701317477809 = 4252892^2 + 837447^2 .

It is a cyclic number.

It is not a de Polignac number, because 18788407841473 - 2¹³ = 18788407833281 is a prime.

It is not a weakly prime, because it can be changed into another prime (18788407841477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9394203920736 + 9394203920737.

It is an arithmetic number, because the mean of its divisors is an integer number (9394203920737).

Almost surely, 2^{18788407841473} is an apocalyptic number.

It is an amenable number.

18788407841473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18788407841473 is an equidigital number, since it uses as much as digits as its factorization.

18788407841473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 269746176, while the sum is 70.

The spelling of 18788407841473 in words is "eighteen trillion, seven hundred eighty-eight billion, four hundred seven million, eight hundred forty-one thousand, four hundred seventy-three".