19705473 has 12 divisors (see below), whose sum is σ = 28502500. Its totient is φ = 13118976.

The previous prime is 19705463. The next prime is 19705487. The reversal of 19705473 is 37450791.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3448449 + 16257024 = 1857^2 + 4032^2 .

It is not a de Polignac number, because 19705473 - 2¹⁸ = 19443329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19705463) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 10365 + ... + 12117.

Almost surely, 2^19705473 is an apocalyptic number.

It is an amenable number.

19705473 is a deficient number, since it is larger than the sum of its proper divisors (8797027).

19705473 is a wasteful number, since it uses less digits than its factorization.

19705473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3008 (or 3005 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 19705473 is about 4439.0847029540. The cubic root of 19705473 is about 270.1027181189.

It can be divided in two parts, 1970547 and 3, that multiplied together give a triangular number (5911641 = T₃₄₃₈).

The spelling of 19705473 in words is "nineteen million, seven hundred five thousand, four hundred seventy-three".