19964475 has 30 divisors (see below), whose sum is σ = 36984860. Its totient is φ = 10646640.

The previous prime is 19964471. The next prime is 19964489. The reversal of 19964475 is 57446991.

It is not a de Polignac number, because 19964475 - 2² = 19964471 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 19964475.

It is not an unprimeable number, because it can be changed into a prime (19964471) 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 29 ways as a sum of consecutive naturals, for example, 2905 + ... + 6954.

Almost surely, 2^19964475 is an apocalyptic number.

19964475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19964475 is a deficient number, since it is larger than the sum of its proper divisors (17020385).

19964475 is an equidigital number, since it uses as much as digits as its factorization.

19964475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9881 (or 9867 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 19964475 is about 4468.1623739520. The cubic root of 19964475 is about 271.2809502651.

The spelling of 19964475 in words is "nineteen million, nine hundred sixty-four thousand, four hundred seventy-five".