18420313353 has 24 divisors (see below), whose sum is σ = 26612621280. Its totient is φ = 11328071040.

The previous prime is 18420313337. The next prime is 18420313381. The reversal of 18420313353 is 35331302481.

It is not a de Polignac number, because 18420313353 - 2⁴ = 18420313337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18420313313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 809613 + ... + 832053.

It is an arithmetic number, because the mean of its divisors is an integer number (1108859220).

Almost surely, 2^18420313353 is an apocalyptic number.

18420313353 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18420313353 is a deficient number, since it is larger than the sum of its proper divisors (8192307927).

18420313353 is a wasteful number, since it uses less digits than its factorization.

18420313353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24089 (or 24076 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 18420313353 in words is "eighteen billion, four hundred twenty million, three hundred thirteen thousand, three hundred fifty-three".