18554641 has 4 divisors (see below), whose sum is σ = 21205312. Its totient is φ = 15903972.

The previous prime is 18554623. The next prime is 18554663. The reversal of 18554641 is 14645581.

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: 14645581 = 1181 ⋅12401.

It is not a de Polignac number, because 18554641 - 2²³ = 10166033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18554597 and 18554606.

It is not an unprimeable number, because it can be changed into a prime (18554681) 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, 1325325 + ... + 1325338.

It is an arithmetic number, because the mean of its divisors is an integer number (5301328).

Almost surely, 2^18554641 is an apocalyptic number.

It is an amenable number.

18554641 is a deficient number, since it is larger than the sum of its proper divisors (2650671).

18554641 is an equidigital number, since it uses as much as digits as its factorization.

18554641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650670.

The product of its digits is 19200, while the sum is 34.

The square root of 18554641 is about 4307.5098374815. The cubic root of 18554641 is about 264.7387528612.

The spelling of 18554641 in words is "eighteen million, five hundred fifty-four thousand, six hundred forty-one".