18061523 has 2 divisors, whose sum is σ = 18061524. Its totient is φ = 18061522.

The previous prime is 18061501. The next prime is 18061529. The reversal of 18061523 is 32516081.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18061523 is a prime.

It is a super-2 number, since 2×18061523² = 652437226159058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18061492 and 18061501.

It is not a weakly prime, because it can be changed into another prime (18061529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9030761 + 9030762.

It is an arithmetic number, because the mean of its divisors is an integer number (9030762).

Almost surely, 2^18061523 is an apocalyptic number.

18061523 is a deficient number, since it is larger than the sum of its proper divisors (1).

18061523 is an equidigital number, since it uses as much as digits as its factorization.

18061523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 18061523 is about 4249.8850572692. The cubic root of 18061523 is about 262.3723848327.

The spelling of 18061523 in words is "eighteen million, sixty-one thousand, five hundred twenty-three".