18883144457 has 4 divisors (see below), whose sum is σ = 19284913536. Its totient is φ = 18481375380.

The previous prime is 18883144409. The next prime is 18883144481. The reversal of 18883144457 is 75444138881.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75444138881 = 16231 ⋅4648151.

It is a cyclic number.

It is not a de Polignac number, because 18883144457 - 2⁶ = 18883144393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18883144399 and 18883144408.

It is not an unprimeable number, because it can be changed into a prime (18883144157) 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, 200884469 + ... + 200884562.

It is an arithmetic number, because the mean of its divisors is an integer number (4821228384).

Almost surely, 2^18883144457 is an apocalyptic number.

It is an amenable number.

18883144457 is a deficient number, since it is larger than the sum of its proper divisors (401769079).

18883144457 is an equidigital number, since it uses as much as digits as its factorization.

18883144457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401769078.

The product of its digits is 3440640, while the sum is 53.

The spelling of 18883144457 in words is "eighteen billion, eight hundred eighty-three million, one hundred forty-four thousand, four hundred fifty-seven".