18027456920399 has 16 divisors (see below), whose sum is σ = 18904970185920. Its totient is φ = 17167012450560.

The previous prime is 18027456920327. The next prime is 18027456920453. The reversal of 18027456920399 is 99302965472081.

It is a cyclic number.

It is not a de Polignac number, because 18027456920399 - 2²⁴ = 18027440143183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18027456920899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191916254 + ... + 192010164.

It is an arithmetic number, because the mean of its divisors is an integer number (1181560636620).

It is a 1-persistent number, because it is pandigital, but 2⋅18027456920399 = 36054913840798 is not.

Almost surely, 2^{18027456920399} is an apocalyptic number.

18027456920399 is a deficient number, since it is larger than the sum of its proper divisors (877513265521).

18027456920399 is an equidigital number, since it uses as much as digits as its factorization.

18027456920399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184690.

The product of its (nonzero) digits is 58786560, while the sum is 65.

The spelling of 18027456920399 in words is "eighteen trillion, twenty-seven billion, four hundred fifty-six million, nine hundred twenty thousand, three hundred ninety-nine".