19716901 has 8 divisors (see below), whose sum is σ = 20279160. Its totient is φ = 19161792.

The previous prime is 19716863. The next prime is 19716929. The reversal of 19716901 is 10961791.

It can be written as a sum of positive squares in 4 ways, for example, as 11730625 + 7986276 = 3425^2 + 2826^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 19716901 - 2¹³ = 19708709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19716001) 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, 4071 + ... + 7483.

It is an arithmetic number, because the mean of its divisors is an integer number (2534895).

Almost surely, 2^19716901 is an apocalyptic number.

It is an amenable number.

19716901 is a deficient number, since it is larger than the sum of its proper divisors (562259).

19716901 is a wasteful number, since it uses less digits than its factorization.

19716901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3575.

The product of its (nonzero) digits is 3402, while the sum is 34.

The square root of 19716901 is about 4440.3717186740. The cubic root of 19716901 is about 270.1549225216.

The spelling of 19716901 in words is "nineteen million, seven hundred sixteen thousand, nine hundred one".