19945463 has 4 divisors (see below), whose sum is σ = 19962360. Its totient is φ = 19928568.

The previous prime is 19945451. The next prime is 19945469. The reversal of 19945463 is 36454991.

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 19945463 - 2⁴ = 19945447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19945463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19945469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6533 + ... + 9086.

It is an arithmetic number, because the mean of its divisors is an integer number (4990590).

Almost surely, 2^19945463 is an apocalyptic number.

19945463 is a deficient number, since it is larger than the sum of its proper divisors (16897).

19945463 is a wasteful number, since it uses less digits than its factorization.

19945463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16896.

The product of its digits is 116640, while the sum is 41.

The square root of 19945463 is about 4466.0343706694. The cubic root of 19945463 is about 271.1948100674.

The spelling of 19945463 in words is "nineteen million, nine hundred forty-five thousand, four hundred sixty-three".