18026841457 has 4 divisors (see below), whose sum is σ = 18117428800. Its totient is φ = 17936254116.

The previous prime is 18026841449. The next prime is 18026841461. The reversal of 18026841457 is 75414862081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18026841457 - 2³ = 18026841449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18026841257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45293373 + ... + 45293770.

It is an arithmetic number, because the mean of its divisors is an integer number (4529357200).

Almost surely, 2^18026841457 is an apocalyptic number.

It is an amenable number.

18026841457 is a deficient number, since it is larger than the sum of its proper divisors (90587343).

18026841457 is an equidigital number, since it uses as much as digits as its factorization.

18026841457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90587342.

The product of its (nonzero) digits is 430080, while the sum is 46.

The spelling of 18026841457 in words is "eighteen billion, twenty-six million, eight hundred forty-one thousand, four hundred fifty-seven".