19445099 has 2 divisors, whose sum is σ = 19445100. Its totient is φ = 19445098.

The previous prime is 19445089. The next prime is 19445119. The reversal of 19445099 is 99054491.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19445099 - 2²⁰ = 18396523 is a prime.

It is a super-2 number, since 2×19445099² = 756223750239602, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19445009) 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, 9722549 + 9722550.

It is an arithmetic number, because the mean of its divisors is an integer number (9722550).

Almost surely, 2^19445099 is an apocalyptic number.

19445099 is a deficient number, since it is larger than the sum of its proper divisors (1).

19445099 is an equidigital number, since it uses as much as digits as its factorization.

19445099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 19445099 is about 4409.6597374401. The cubic root of 19445099 is about 268.9077916712.

The spelling of 19445099 in words is "nineteen million, four hundred forty-five thousand, ninety-nine".