19706045 has 4 divisors (see below), whose sum is σ = 23647260. Its totient is φ = 15764832.

The previous prime is 19706039. The next prime is 19706053. The reversal of 19706045 is 54060791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54060791 = 1609 ⋅33599.

It can be written as a sum of positive squares in 2 ways, for example, as 6666724 + 13039321 = 2582^2 + 3611^2 .

It is a cyclic number.

It is not a de Polignac number, because 19706045 - 2⁶ = 19705981 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1970600 + ... + 1970609.

It is an arithmetic number, because the mean of its divisors is an integer number (5911815).

Almost surely, 2^19706045 is an apocalyptic number.

It is an amenable number.

19706045 is a deficient number, since it is larger than the sum of its proper divisors (3941215).

19706045 is an equidigital number, since it uses as much as digits as its factorization.

19706045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3941214.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 19706045 is about 4439.1491301825. The cubic root of 19706045 is about 270.1053315596.

The spelling of 19706045 in words is "nineteen million, seven hundred six thousand, forty-five".