19725085 has 4 divisors (see below), whose sum is σ = 23670108. Its totient is φ = 15780064.

The previous prime is 19725077. The next prime is 19725091. The reversal of 19725085 is 58052791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6380676 + 13344409 = 2526^2 + 3653^2 .

It is a cyclic number.

It is not a de Polignac number, because 19725085 - 2³ = 19725077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1972504 + ... + 1972513.

It is an arithmetic number, because the mean of its divisors is an integer number (5917527).

Almost surely, 2^19725085 is an apocalyptic number.

It is an amenable number.

19725085 is a deficient number, since it is larger than the sum of its proper divisors (3945023).

19725085 is an equidigital number, since it uses as much as digits as its factorization.

19725085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3945022.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 19725085 is about 4441.2931675358. The cubic root of 19725085 is about 270.1922955695.

The spelling of 19725085 in words is "nineteen million, seven hundred twenty-five thousand, eighty-five".