18046825553 has 4 divisors (see below), whose sum is σ = 18628981248. Its totient is φ = 17464669860.

The previous prime is 18046825543. The next prime is 18046825619. The reversal of 18046825553 is 35552864081.

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 18046825553 - 2⁸ = 18046825297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18046825498 and 18046825507.

It is not an unprimeable number, because it can be changed into a prime (18046825543) 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, 291077801 + ... + 291077862.

It is an arithmetic number, because the mean of its divisors is an integer number (4657245312).

Almost surely, 2^18046825553 is an apocalyptic number.

It is an amenable number.

18046825553 is a deficient number, since it is larger than the sum of its proper divisors (582155695).

18046825553 is an equidigital number, since it uses as much as digits as its factorization.

18046825553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582155694.

The product of its (nonzero) digits is 1152000, while the sum is 47.

The spelling of 18046825553 in words is "eighteen billion, forty-six million, eight hundred twenty-five thousand, five hundred fifty-three".