18409226353 has 6 divisors (see below), whose sum is σ = 21414814386. Its totient is φ = 15779336832.

The previous prime is 18409226333. The next prime is 18409226371. The reversal of 18409226353 is 35362290481.

It can be written as a sum of positive squares in only one way, i.e., 18061478449 + 347747904 = 134393^2 + 18648^2 .

It is not a de Polignac number, because 18409226353 - 2⁵ = 18409226321 is a prime.

It is a super-2 number, since 2×18409226353² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18409226323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 187849200 + ... + 187849297.

It is an arithmetic number, because the mean of its divisors is an integer number (3569135731).

Almost surely, 2^18409226353 is an apocalyptic number.

It is an amenable number.

18409226353 is a deficient number, since it is larger than the sum of its proper divisors (3005588033).

18409226353 is an equidigital number, since it uses as much as digits as its factorization.

18409226353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375698511 (or 375698504 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 18409226353 in words is "eighteen billion, four hundred nine million, two hundred twenty-six thousand, three hundred fifty-three".