19713930 has 16 divisors (see below), whose sum is σ = 47313504. Its totient is φ = 5257040.

The previous prime is 19713929. The next prime is 19713937. The reversal of 19713930 is 3931791.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 19713891 and 19713900.

It is not an unprimeable number, because it can be changed into a prime (19713937) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 328536 + ... + 328595.

It is an arithmetic number, because the mean of its divisors is an integer number (2957094).

Almost surely, 2^19713930 is an apocalyptic number.

19713930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19713930 is an abundant number, since it is smaller than the sum of its proper divisors (27599574).

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

19713930 is a wasteful number, since it uses less digits than its factorization.

19713930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657141.

The product of its (nonzero) digits is 5103, while the sum is 33.

The square root of 19713930 is about 4440.0371620066. The cubic root of 19713930 is about 270.1413525968.

The spelling of 19713930 in words is "nineteen million, seven hundred thirteen thousand, nine hundred thirty".