18125477 has 2 divisors, whose sum is σ = 18125478. Its totient is φ = 18125476.

The previous prime is 18125467. The next prime is 18125507. The reversal of 18125477 is 77452181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16273156 + 1852321 = 4034^2 + 1361^2 .

It is an emirp because it is prime and its reverse (77452181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18125477 - 2⁶ = 18125413 is a prime.

It is equal to p_1158794 and since 18125477 and 1158794 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18125407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9062738 + 9062739.

It is an arithmetic number, because the mean of its divisors is an integer number (9062739).

Almost surely, 2^18125477 is an apocalyptic number.

It is an amenable number.

18125477 is a deficient number, since it is larger than the sum of its proper divisors (1).

18125477 is an equidigital number, since it uses as much as digits as its factorization.

18125477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15680, while the sum is 35.

The square root of 18125477 is about 4257.4026119220. The cubic root of 18125477 is about 262.6816979368.

The spelling of 18125477 in words is "eighteen million, one hundred twenty-five thousand, four hundred seventy-seven".