18054893 has 2 divisors, whose sum is σ = 18054894. Its totient is φ = 18054892.

The previous prime is 18054889. The next prime is 18054917. The reversal of 18054893 is 39845081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17960644 + 94249 = 4238^2 + 307^2 .

It is an emirp because it is prime and its reverse (39845081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18054893 - 2² = 18054889 is a prime.

It is a super-2 number, since 2×18054893² = 651958322482898, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18054593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9027446 + 9027447.

It is an arithmetic number, because the mean of its divisors is an integer number (9027447).

Almost surely, 2^18054893 is an apocalyptic number.

It is an amenable number.

18054893 is a deficient number, since it is larger than the sum of its proper divisors (1).

18054893 is an equidigital number, since it uses as much as digits as its factorization.

18054893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 18054893 is about 4249.1049645778. The cubic root of 18054893 is about 262.3402771343.

The spelling of 18054893 in words is "eighteen million, fifty-four thousand, eight hundred ninety-three".