19749085 has 8 divisors (see below), whose sum is σ = 24277176. Its totient is φ = 15413760.

The previous prime is 19749073. The next prime is 19749089. The reversal of 19749085 is 58094791.

It can be written as a sum of positive squares in 4 ways, for example, as 8836 + 19740249 = 94^2 + 4443^2 .

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

It is not a de Polignac number, because 19749085 - 2⁷ = 19748957 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 (19749089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47964 + ... + 48373.

It is an arithmetic number, because the mean of its divisors is an integer number (3034647).

Almost surely, 2^19749085 is an apocalyptic number.

It is an amenable number.

19749085 is a deficient number, since it is larger than the sum of its proper divisors (4528091).

19749085 is an equidigital number, since it uses as much as digits as its factorization.

19749085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96383.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 19749085 is about 4443.9942619225. The cubic root of 19749085 is about 270.3018343771.

The spelling of 19749085 in words is "nineteen million, seven hundred forty-nine thousand, eighty-five".