18054621 has 12 divisors (see below), whose sum is σ = 28085148. Its totient is φ = 11110464.

The previous prime is 18054613. The next prime is 18054653. The reversal of 18054621 is 12645081.

It can be written as a sum of positive squares in 2 ways, for example, as 2134521 + 15920100 = 1461^2 + 3990^2 .

It is not a de Polignac number, because 18054621 - 2³ = 18054613 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18054601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77040 + ... + 77273.

It is an arithmetic number, because the mean of its divisors is an integer number (2340429).

Almost surely, 2^18054621 is an apocalyptic number.

It is an amenable number.

18054621 is a deficient number, since it is larger than the sum of its proper divisors (10030527).

18054621 is a wasteful number, since it uses less digits than its factorization.

18054621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154332 (or 154329 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 18054621 is about 4249.0729577168. The cubic root of 18054621 is about 262.3389597275.

The spelling of 18054621 in words is "eighteen million, fifty-four thousand, six hundred twenty-one".