19794455 has 4 divisors (see below), whose sum is σ = 23753352. Its totient is φ = 15835560.

The previous prime is 19794449. The next prime is 19794469. The reversal of 19794455 is 55449791.

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

It is not a de Polignac number, because 19794455 - 2⁶ = 19794391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1979441 + ... + 1979450.

It is an arithmetic number, because the mean of its divisors is an integer number (5938338).

Almost surely, 2^19794455 is an apocalyptic number.

19794455 is a deficient number, since it is larger than the sum of its proper divisors (3958897).

19794455 is an equidigital number, since it uses as much as digits as its factorization.

19794455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3958896.

The product of its digits is 226800, while the sum is 44.

The square root of 19794455 is about 4449.0959755887. The cubic root of 19794455 is about 270.5086661544.

The spelling of 19794455 in words is "nineteen million, seven hundred ninety-four thousand, four hundred fifty-five".