18290357 has 2 divisors, whose sum is σ = 18290358. Its totient is φ = 18290356.

The previous prime is 18290339. The next prime is 18290383. The reversal of 18290357 is 75309281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16313521 + 1976836 = 4039^2 + 1406^2 .

It is an emirp because it is prime and its reverse (75309281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18290357 - 2⁸ = 18290101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18290257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9145178 + 9145179.

It is an arithmetic number, because the mean of its divisors is an integer number (9145179).

Almost surely, 2^18290357 is an apocalyptic number.

It is an amenable number.

18290357 is a deficient number, since it is larger than the sum of its proper divisors (1).

18290357 is an equidigital number, since it uses as much as digits as its factorization.

18290357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 18290357 is about 4276.7226938393. The cubic root of 18290357 is about 263.4757973274.

The spelling of 18290357 in words is "eighteen million, two hundred ninety thousand, three hundred fifty-seven".