19994495 has 4 divisors (see below), whose sum is σ = 23993400. Its totient is φ = 15995592.

The previous prime is 19994489. The next prime is 19994503. The reversal of 19994495 is 59449991.

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

It is a cyclic number.

It is not a de Polignac number, because 19994495 - 2¹⁶ = 19928959 is a prime.

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, 1999445 + ... + 1999454.

It is an arithmetic number, because the mean of its divisors is an integer number (5998350).

Almost surely, 2^19994495 is an apocalyptic number.

19994495 is a deficient number, since it is larger than the sum of its proper divisors (3998905).

19994495 is an equidigital number, since it uses as much as digits as its factorization.

19994495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998904.

The product of its digits is 524880, while the sum is 50.

The square root of 19994495 is about 4471.5204349304. The cubic root of 19994495 is about 271.4168545925.

The spelling of 19994495 in words is "nineteen million, nine hundred ninety-four thousand, four hundred ninety-five".