18491808495 has 16 divisors (see below), whose sum is σ = 29609562240. Its totient is φ = 9854741664.

The previous prime is 18491808487. The next prime is 18491808529. The reversal of 18491808495 is 59480819481.

It is not a de Polignac number, because 18491808495 - 2³ = 18491808487 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 452005 + ... + 491214.

It is an arithmetic number, because the mean of its divisors is an integer number (1850597640).

Almost surely, 2^18491808495 is an apocalyptic number.

18491808495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18491808495 is a deficient number, since it is larger than the sum of its proper divisors (11117753745).

18491808495 is a wasteful number, since it uses less digits than its factorization.

18491808495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944534.

The product of its (nonzero) digits is 3317760, while the sum is 57.

The spelling of 18491808495 in words is "eighteen billion, four hundred ninety-one million, eight hundred eight thousand, four hundred ninety-five".