19794945 has 16 divisors (see below), whose sum is σ = 31965120. Its totient is φ = 10459584.

The previous prime is 19794937. The next prime is 19794959. The reversal of 19794945 is 54949791.

It is not a de Polignac number, because 19794945 - 2³ = 19794937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19794894 and 19794903.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4419 + ... + 7688.

It is an arithmetic number, because the mean of its divisors is an integer number (1997820).

Almost surely, 2^19794945 is an apocalyptic number.

19794945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19794945 is a deficient number, since it is larger than the sum of its proper divisors (12170175).

19794945 is a wasteful number, since it uses less digits than its factorization.

19794945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12224.

The product of its digits is 408240, while the sum is 48.

The square root of 19794945 is about 4449.1510426148. The cubic root of 19794945 is about 270.5108982299.

The spelling of 19794945 in words is "nineteen million, seven hundred ninety-four thousand, nine hundred forty-five".