19730164 has 6 divisors (see below), whose sum is σ = 34527794. Its totient is φ = 9865080.

The previous prime is 19730153. The next prime is 19730173. The reversal of 19730164 is 46103791.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18147600 + 1582564 = 4260^2 + 1258^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2466267 + ... + 2466274.

Almost surely, 2^19730164 is an apocalyptic number.

It is an amenable number.

19730164 is a deficient number, since it is larger than the sum of its proper divisors (14797630).

19730164 is a wasteful number, since it uses less digits than its factorization.

19730164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932545 (or 4932543 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 19730164 is about 4441.8649236554. The cubic root of 19730164 is about 270.2154841286.

The spelling of 19730164 in words is "nineteen million, seven hundred thirty thousand, one hundred sixty-four".