18485744494 has 16 divisors (see below), whose sum is σ = 31821346656. Its totient is φ = 7889587200.

The previous prime is 18485744491. The next prime is 18485744503. The reversal of 18485744494 is 49444758481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18485744491) 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, 2736067 + ... + 2742814.

It is an arithmetic number, because the mean of its divisors is an integer number (1988834166).

Almost surely, 2^18485744494 is an apocalyptic number.

18485744494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18485744494 is a deficient number, since it is larger than the sum of its proper divisors (13335602162).

18485744494 is a wasteful number, since it uses less digits than its factorization.

18485744494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5479131.

The product of its digits is 20643840, while the sum is 58.

The spelling of 18485744494 in words is "eighteen billion, four hundred eighty-five million, seven hundred forty-four thousand, four hundred ninety-four".