19730664 has 48 divisors (see below), whose sum is σ = 56253600. Its totient is φ = 6230304.

The previous prime is 19730609. The next prime is 19730671. The reversal of 19730664 is 46603791.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5844 + ... + 8579.

It is an arithmetic number, because the mean of its divisors is an integer number (1171950).

Almost surely, 2^19730664 is an apocalyptic number.

It is an amenable number.

19730664 is an abundant number, since it is smaller than the sum of its proper divisors (36522936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19730664 is a wasteful number, since it uses less digits than its factorization.

19730664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14454 (or 14447 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 19730664 is about 4441.9212059648. The cubic root of 19730664 is about 270.2177667013.

The spelling of 19730664 in words is "nineteen million, seven hundred thirty thousand, six hundred sixty-four".