19713130 has 8 divisors (see below), whose sum is σ = 35483652. Its totient is φ = 7885248.

The previous prime is 19713121. The next prime is 19713131. The reversal of 19713130 is 3131791.

It can be written as a sum of positive squares in 2 ways, for example, as 16152361 + 3560769 = 4019^2 + 1887^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a magnanimous number.

It is a junction number, because it is equal to n+sod(n) for n = 19713095 and 19713104.

It is not an unprimeable number, because it can be changed into a prime (19713131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 985647 + ... + 985666.

Almost surely, 2^19713130 is an apocalyptic number.

19713130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19713130 is a deficient number, since it is larger than the sum of its proper divisors (15770522).

19713130 is a wasteful number, since it uses less digits than its factorization.

19713130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971320.

The product of its (nonzero) digits is 567, while the sum is 25.

The square root of 19713130 is about 4439.9470717566. The cubic root of 19713130 is about 270.1376983955.

The spelling of 19713130 in words is "nineteen million, seven hundred thirteen thousand, one hundred thirty".