19964495 has 4 divisors (see below), whose sum is σ = 23957400. Its totient is φ = 15971592.

The previous prime is 19964489. The next prime is 19964533. The reversal of 19964495 is 59446991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59446991 = 19 ⋅3128789.

It is a cyclic number.

It is not a de Polignac number, because 19964495 - 2²² = 15770191 is a prime.

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, 1996445 + ... + 1996454.

It is an arithmetic number, because the mean of its divisors is an integer number (5989350).

Almost surely, 2^19964495 is an apocalyptic number.

19964495 is a deficient number, since it is larger than the sum of its proper divisors (3992905).

19964495 is an equidigital number, since it uses as much as digits as its factorization.

19964495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992904.

The product of its digits is 349920, while the sum is 47.

The square root of 19964495 is about 4468.1646120079. The cubic root of 19964495 is about 271.2810408529.

The spelling of 19964495 in words is "nineteen million, nine hundred sixty-four thousand, four hundred ninety-five".