18446357 has 2 divisors, whose sum is σ = 18446358. Its totient is φ = 18446356.

The previous prime is 18446353. The next prime is 18446371. The reversal of 18446357 is 75364481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18438436 + 7921 = 4294^2 + 89^2 .

It is a cyclic number.

It is not a de Polignac number, because 18446357 - 2² = 18446353 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18446357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18446353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9223178 + 9223179.

It is an arithmetic number, because the mean of its divisors is an integer number (9223179).

Almost surely, 2^18446357 is an apocalyptic number.

It is an amenable number.

18446357 is a deficient number, since it is larger than the sum of its proper divisors (1).

18446357 is an equidigital number, since it uses as much as digits as its factorization.

18446357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 18446357 is about 4294.9222344531. The cubic root of 18446357 is about 264.2227468480. Note that the first 3 decimals are identical.

The spelling of 18446357 in words is "eighteen million, four hundred forty-six thousand, three hundred fifty-seven".