18740329 has 2 divisors, whose sum is σ = 18740330. Its totient is φ = 18740328.

The previous prime is 18740317. The next prime is 18740333. The reversal of 18740329 is 92304781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18619225 + 121104 = 4315^2 + 348^2 .

It is a cyclic number.

It is not a de Polignac number, because 18740329 - 2⁵ = 18740297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18740294 and 18740303.

It is not a weakly prime, because it can be changed into another prime (18740339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9370164 + 9370165.

It is an arithmetic number, because the mean of its divisors is an integer number (9370165).

Almost surely, 2^18740329 is an apocalyptic number.

It is an amenable number.

18740329 is a deficient number, since it is larger than the sum of its proper divisors (1).

18740329 is an equidigital number, since it uses as much as digits as its factorization.

18740329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 18740329 is about 4329.0101639982. The cubic root of 18740329 is about 265.6189590137.

The spelling of 18740329 in words is "eighteen million, seven hundred forty thousand, three hundred twenty-nine".