18193061 has 2 divisors, whose sum is σ = 18193062. Its totient is φ = 18193060.

The previous prime is 18193057. The next prime is 18193117. The reversal of 18193061 is 16039181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17181025 + 1012036 = 4145^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 18193061 - 2² = 18193057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18193261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9096530 + 9096531.

It is an arithmetic number, because the mean of its divisors is an integer number (9096531).

Almost surely, 2^18193061 is an apocalyptic number.

It is an amenable number.

18193061 is a deficient number, since it is larger than the sum of its proper divisors (1).

18193061 is an equidigital number, since it uses as much as digits as its factorization.

18193061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 18193061 is about 4265.3324606647. The cubic root of 18193061 is about 263.0077778208.

The spelling of 18193061 in words is "eighteen million, one hundred ninety-three thousand, sixty-one".