19998353 has 2 divisors, whose sum is σ = 19998354. Its totient is φ = 19998352.

The previous prime is 19998337. The next prime is 19998367. The reversal of 19998353 is 35389991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13300609 + 6697744 = 3647^2 + 2588^2 .

It is a cyclic number.

It is not a de Polignac number, because 19998353 - 2⁴ = 19998337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19998298 and 19998307.

It is not a weakly prime, because it can be changed into another prime (19998373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9999176 + 9999177.

It is an arithmetic number, because the mean of its divisors is an integer number (9999177).

Almost surely, 2^19998353 is an apocalyptic number.

It is an amenable number.

19998353 is a deficient number, since it is larger than the sum of its proper divisors (1).

19998353 is an equidigital number, since it uses as much as digits as its factorization.

19998353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 47.

The square root of 19998353 is about 4471.9518110105. The cubic root of 19998353 is about 271.4343103786.

The spelling of 19998353 in words is "nineteen million, nine hundred ninety-eight thousand, three hundred fifty-three".