19697963 has 4 divisors (see below), whose sum is σ = 19708920. Its totient is φ = 19687008.

The previous prime is 19697957. The next prime is 19697969. The reversal of 19697963 is 36979691.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (19697957) and next prime (19697969).

It is a cyclic number.

It is not a de Polignac number, because 19697963 - 2⁴ = 19697947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19697969) 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 3 ways as a sum of consecutive naturals, for example, 2078 + ... + 6611.

It is an arithmetic number, because the mean of its divisors is an integer number (4927230).

Almost surely, 2^19697963 is an apocalyptic number.

19697963 is a deficient number, since it is larger than the sum of its proper divisors (10957).

19697963 is an equidigital number, since it uses as much as digits as its factorization.

19697963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10956.

The product of its digits is 551124, while the sum is 50.

The square root of 19697963 is about 4438.2387272430. The cubic root of 19697963 is about 270.0684005943.

The spelling of 19697963 in words is "nineteen million, six hundred ninety-seven thousand, nine hundred sixty-three".