18594018553 has 4 divisors (see below), whose sum is σ = 20284383888. Its totient is φ = 16903653220.

The previous prime is 18594018539. The next prime is 18594018577. The reversal of 18594018553 is 35581049581.

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 a de Polignac number, because none of the positive numbers 2^k-18594018553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18594018497 and 18594018506.

It is not an unprimeable number, because it can be changed into a prime (18594018503) 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, 845182651 + ... + 845182672.

It is an arithmetic number, because the mean of its divisors is an integer number (5071095972).

Almost surely, 2^18594018553 is an apocalyptic number.

It is an amenable number.

18594018553 is a deficient number, since it is larger than the sum of its proper divisors (1690365335).

18594018553 is a wasteful number, since it uses less digits than its factorization.

18594018553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690365334.

The product of its (nonzero) digits is 864000, while the sum is 49.

The spelling of 18594018553 in words is "eighteen billion, five hundred ninety-four million, eighteen thousand, five hundred fifty-three".