19795091 has 4 divisors (see below), whose sum is σ = 19991184. Its totient is φ = 19599000.

The previous prime is 19795079. The next prime is 19795099. The reversal of 19795091 is 19059791.

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: 19059791 = 4027 ⋅4733.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19795091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19795099) 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, 97895 + ... + 98096.

It is an arithmetic number, because the mean of its divisors is an integer number (4997796).

Almost surely, 2^19795091 is an apocalyptic number.

19795091 is a deficient number, since it is larger than the sum of its proper divisors (196093).

19795091 is a wasteful number, since it uses less digits than its factorization.

19795091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196092.

The product of its (nonzero) digits is 25515, while the sum is 41.

The square root of 19795091 is about 4449.1674502091. The cubic root of 19795091 is about 270.5115632901.

The spelling of 19795091 in words is "nineteen million, seven hundred ninety-five thousand, ninety-one".