18240073553 has 8 divisors (see below), whose sum is σ = 19891804800. Its totient is φ = 16623863568.

The previous prime is 18240073531. The next prime is 18240073603. The reversal of 18240073553 is 35537004281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18240073553 - 2⁸ = 18240073297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18240073253) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8879243 + ... + 8881296.

It is an arithmetic number, because the mean of its divisors is an integer number (2486475600).

Almost surely, 2^18240073553 is an apocalyptic number.

18240073553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18240073553 is a deficient number, since it is larger than the sum of its proper divisors (1651731247).

18240073553 is a wasteful number, since it uses less digits than its factorization.

18240073553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17760631.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 18240073553 in words is "eighteen billion, two hundred forty million, seventy-three thousand, five hundred fifty-three".