18054913 has 4 divisors (see below), whose sum is σ = 18082260. Its totient is φ = 18027568.

The previous prime is 18054893. The next prime is 18054917. The reversal of 18054913 is 31945081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31945081 = 7 ⋅4563583.

It can be written as a sum of positive squares in 2 ways, for example, as 17875984 + 178929 = 4228^2 + 423^2 .

It is a cyclic number.

It is not a de Polignac number, because 18054913 - 2⁹ = 18054401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18054917) 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, 12658 + ... + 14011.

It is an arithmetic number, because the mean of its divisors is an integer number (4520565).

Almost surely, 2^18054913 is an apocalyptic number.

It is an amenable number.

18054913 is a deficient number, since it is larger than the sum of its proper divisors (27347).

18054913 is an equidigital number, since it uses as much as digits as its factorization.

18054913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27346.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 18054913 is about 4249.1073180140. The cubic root of 18054913 is about 262.3403740019.

Adding to 18054913 its reverse (31945081), we get a palindrome (49999994).

The spelling of 18054913 in words is "eighteen million, fifty-four thousand, nine hundred thirteen".