18795649 has 2 divisors, whose sum is σ = 18795650. Its totient is φ = 18795648.

The previous prime is 18795631. The next prime is 18795653. The reversal of 18795649 is 94659781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17514225 + 1281424 = 4185^2 + 1132^2 .

It is a cyclic number.

It is not a de Polignac number, because 18795649 - 2⁷ = 18795521 is a prime.

It is a super-3 number, since 3×18795649³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (18795449) 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, 9397824 + 9397825.

It is an arithmetic number, because the mean of its divisors is an integer number (9397825).

Almost surely, 2^18795649 is an apocalyptic number.

It is an amenable number.

18795649 is a deficient number, since it is larger than the sum of its proper divisors (1).

18795649 is an equidigital number, since it uses as much as digits as its factorization.

18795649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 49.

The square root of 18795649 is about 4335.3949070413. The cubic root of 18795649 is about 265.8800644603.

The spelling of 18795649 in words is "eighteen million, seven hundred ninety-five thousand, six hundred forty-nine".