19704965 has 16 divisors (see below), whose sum is σ = 27654528. Its totient is φ = 13196736.

The previous prime is 19704959. The next prime is 19704973. The reversal of 19704965 is 56940791.

It is not a de Polignac number, because 19704965 - 2¹⁶ = 19639429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5042 + ... + 8051.

It is an arithmetic number, because the mean of its divisors is an integer number (1728408).

Almost surely, 2^19704965 is an apocalyptic number.

It is an amenable number.

19704965 is a deficient number, since it is larger than the sum of its proper divisors (7949563).

19704965 is a wasteful number, since it uses less digits than its factorization.

19704965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13148.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 19704965 is about 4439.0274835824. The cubic root of 19704965 is about 270.1003970486.

The spelling of 19704965 in words is "nineteen million, seven hundred four thousand, nine hundred sixty-five".