19500049 has 2 divisors, whose sum is σ = 19500050. Its totient is φ = 19500048.

The previous prime is 19500043. The next prime is 19500059. The reversal of 19500049 is 94000591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19421649 + 78400 = 4407^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 19500049 - 2⁵ = 19500017 is a prime.

It is a super-2 number, since 2×19500049² = 760503822004802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19500043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9750024 + 9750025.

It is an arithmetic number, because the mean of its divisors is an integer number (9750025).

Almost surely, 2^19500049 is an apocalyptic number.

It is an amenable number.

19500049 is a deficient number, since it is larger than the sum of its proper divisors (1).

19500049 is an equidigital number, since it uses as much as digits as its factorization.

19500049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 19500049 is about 4415.8859813179. The cubic root of 19500049 is about 269.1608560550.

The spelling of 19500049 in words is "nineteen million, five hundred thousand, forty-nine".