19730864 has 10 divisors (see below), whose sum is σ = 38228580. Its totient is φ = 9865424.

The previous prime is 19730857. The next prime is 19730891. The reversal of 19730864 is 46803791.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616574 + ... + 616605.

It is an arithmetic number, because the mean of its divisors is an integer number (3822858).

Almost surely, 2^19730864 is an apocalyptic number.

It is an amenable number.

19730864 is a deficient number, since it is larger than the sum of its proper divisors (18497716).

19730864 is a wasteful number, since it uses less digits than its factorization.

19730864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233187 (or 1233181 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 19730864 is about 4441.9437186889. The cubic root of 19730864 is about 270.2186797196.

The spelling of 19730864 in words is "nineteen million, seven hundred thirty thousand, eight hundred sixty-four".