18455565494 has 16 divisors (see below), whose sum is σ = 28142308896. Its totient is φ = 9074851200.

The previous prime is 18455565473. The next prime is 18455565497. The reversal of 18455565494 is 49456555481.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18455565497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909479 + ... + 929549.

It is an arithmetic number, because the mean of its divisors is an integer number (1758894306).

Almost surely, 2^18455565494 is an apocalyptic number.

18455565494 is a deficient number, since it is larger than the sum of its proper divisors (9686743402).

18455565494 is a wasteful number, since it uses less digits than its factorization.

18455565494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27671.

The product of its digits is 17280000, while the sum is 56.

The spelling of 18455565494 in words is "eighteen billion, four hundred fifty-five million, five hundred sixty-five thousand, four hundred ninety-four".