18493280455 has 16 divisors (see below), whose sum is σ = 24040437120. Its totient is φ = 13656568224.

The previous prime is 18493280453. The next prime is 18493280473. The reversal of 18493280455 is 55408239481.

It is not a de Polignac number, because 18493280455 - 2¹ = 18493280453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18493280399 and 18493280408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18493280453) 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, 830767 + ... + 852736.

It is an arithmetic number, because the mean of its divisors is an integer number (1502527320).

Almost surely, 2^18493280455 is an apocalyptic number.

18493280455 is a deficient number, since it is larger than the sum of its proper divisors (5547156665).

18493280455 is an equidigital number, since it uses as much as digits as its factorization.

18493280455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683547 (or 1683521 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 18493280455 in words is "eighteen billion, four hundred ninety-three million, two hundred eighty thousand, four hundred fifty-five".