18058549 has 2 divisors, whose sum is σ = 18058550. Its totient is φ = 18058548.

The previous prime is 18058541. The next prime is 18058567. The reversal of 18058549 is 94585081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17892900 + 165649 = 4230^2 + 407^2 .

It is a cyclic number.

It is not a de Polignac number, because 18058549 - 2³ = 18058541 is a prime.

It is a super-2 number, since 2×18058549² = 652222383970802, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18058541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9029274 + 9029275.

It is an arithmetic number, because the mean of its divisors is an integer number (9029275).

Almost surely, 2^18058549 is an apocalyptic number.

It is an amenable number.

18058549 is a deficient number, since it is larger than the sum of its proper divisors (1).

18058549 is an equidigital number, since it uses as much as digits as its factorization.

18058549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 40.

The square root of 18058549 is about 4249.5351510489. The cubic root of 18058549 is about 262.3579833469.

The spelling of 18058549 in words is "eighteen million, fifty-eight thousand, five hundred forty-nine".