19725316 has 12 divisors (see below), whose sum is σ = 37174732. Its totient is φ = 9103968.

The previous prime is 19725313. The next prime is 19725317. The reversal of 19725316 is 61352791.

It can be written as a sum of positive squares in 2 ways, for example, as 802816 + 18922500 = 896^2 + 4350^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (19725313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189615 + ... + 189718.

Almost surely, 2^19725316 is an apocalyptic number.

It is an amenable number.

19725316 is a deficient number, since it is larger than the sum of its proper divisors (17449416).

19725316 is a wasteful number, since it uses less digits than its factorization.

19725316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379350 (or 379348 counting only the distinct ones).

The product of its digits is 11340, while the sum is 34.

The square root of 19725316 is about 4441.3191733988. The cubic root of 19725316 is about 270.1933503039.

The spelling of 19725316 in words is "nineteen million, seven hundred twenty-five thousand, three hundred sixteen".