18344453 has 2 divisors, whose sum is σ = 18344454. Its totient is φ = 18344452.

The previous prime is 18344423. The next prime is 18344461. The reversal of 18344453 is 35444381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16265089 + 2079364 = 4033^2 + 1442^2 .

It is a cyclic number.

It is not a de Polignac number, because 18344453 - 2¹⁴ = 18328069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18344423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9172226 + 9172227.

It is an arithmetic number, because the mean of its divisors is an integer number (9172227).

Almost surely, 2^18344453 is an apocalyptic number.

It is an amenable number.

18344453 is a deficient number, since it is larger than the sum of its proper divisors (1).

18344453 is an equidigital number, since it uses as much as digits as its factorization.

18344453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 32.

The square root of 18344453 is about 4283.0424933685. The cubic root of 18344453 is about 263.7352957819.

The spelling of 18344453 in words is "eighteen million, three hundred forty-four thousand, four hundred fifty-three".