18432426816 has 84 divisors (see below), whose sum is σ = 53621891232. Its totient is φ = 6052425984.

The previous prime is 18432426811. The next prime is 18432426821. The reversal of 18432426816 is 61862423481.

18432426816 is a `hidden beast` number, since 184 + 32 + 426 + 8 + 16 = 666.

It is an interprime number because it is at equal distance from previous prime (18432426811) and next prime (18432426821).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18432426811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200220 + ... + 277403.

It is an arithmetic number, because the mean of its divisors is an integer number (638355848).

Almost surely, 2^18432426816 is an apocalyptic number.

18432426816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18432426816 is an abundant number, since it is smaller than the sum of its proper divisors (35189464416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18432426816 is a wasteful number, since it uses less digits than its factorization.

18432426816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477708 (or 477695 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The spelling of 18432426816 in words is "eighteen billion, four hundred thirty-two million, four hundred twenty-six thousand, eight hundred sixteen".