19505045 has 16 divisors (see below), whose sum is σ = 27614208. Its totient is φ = 12942720.

The previous prime is 19505033. The next prime is 19505117. The reversal of 19505045 is 54050591.

It is not a de Polignac number, because 19505045 - 2¹⁰ = 19504021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19504999 and 19505017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7904 + ... + 10073.

It is an arithmetic number, because the mean of its divisors is an integer number (1725888).

Almost surely, 2^19505045 is an apocalyptic number.

It is an amenable number.

19505045 is a deficient number, since it is larger than the sum of its proper divisors (8109163).

19505045 is a wasteful number, since it uses less digits than its factorization.

19505045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18020.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 19505045 is about 4416.4516299853. The cubic root of 19505045 is about 269.1838408316.

The spelling of 19505045 in words is "nineteen million, five hundred five thousand, forty-five".