19945675 has 24 divisors (see below), whose sum is σ = 26596512. Its totient is φ = 14784000.

The previous prime is 19945621. The next prime is 19945691. The reversal of 19945675 is 57654991.

It is not a de Polignac number, because 19945675 - 2¹³ = 19937483 is a prime.

It is a Duffinian 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 23 ways as a sum of consecutive naturals, for example, 29845 + ... + 30505.

It is an arithmetic number, because the mean of its divisors is an integer number (1108188).

Almost surely, 2^19945675 is an apocalyptic number.

19945675 is a deficient number, since it is larger than the sum of its proper divisors (6650837).

19945675 is a wasteful number, since it uses less digits than its factorization.

19945675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759 (or 754 counting only the distinct ones).

The product of its digits is 340200, while the sum is 46.

The square root of 19945675 is about 4466.0581053094. The cubic root of 19945675 is about 271.1957709057.

The spelling of 19945675 in words is "nineteen million, nine hundred forty-five thousand, six hundred seventy-five".