19490505 has 8 divisors (see below), whose sum is σ = 31184832. Its totient is φ = 10394928.

The previous prime is 19490503. The next prime is 19490507. The reversal of 19490505 is 50509491.

It is an interprime number because it is at equal distance from previous prime (19490503) and next prime (19490507).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19490505 - 2¹ = 19490503 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19490503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649669 + ... + 649698.

It is an arithmetic number, because the mean of its divisors is an integer number (3898104).

Almost surely, 2^19490505 is an apocalyptic number.

19490505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19490505 is a deficient number, since it is larger than the sum of its proper divisors (11694327).

19490505 is a wasteful number, since it uses less digits than its factorization.

19490505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299375.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 19490505 is about 4414.8052052157. The cubic root of 19490505 is about 269.1169366709.

Adding to 19490505 its reverse (50509491), we get a palindrome (69999996).

The spelling of 19490505 in words is "nineteen million, four hundred ninety thousand, five hundred five".