19646996 has 6 divisors (see below), whose sum is σ = 34382250. Its totient is φ = 9823496.

The previous prime is 19646989. The next prime is 19646999. The reversal of 19646996 is 69964691.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11155600 + 8491396 = 3340^2 + 2914^2 .

It is a super-5 number, since 5×19646996⁵ (a number of 38 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19646999) 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 as a sum of consecutive naturals, namely, 2455871 + ... + 2455878.

It is an arithmetic number, because the mean of its divisors is an integer number (5730375).

Almost surely, 2^19646996 is an apocalyptic number.

It is an amenable number.

19646996 is a deficient number, since it is larger than the sum of its proper divisors (14735254).

19646996 is a wasteful number, since it uses less digits than its factorization.

19646996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4911753 (or 4911751 counting only the distinct ones).

The product of its digits is 629856, while the sum is 50.

The square root of 19646996 is about 4432.4932036045. The cubic root of 19646996 is about 269.8352721761.

Adding to 19646996 its sum of digits (50), we get a triangular number (19647046 = T₆₂₆₈).

The spelling of 19646996 in words is "nineteen million, six hundred forty-six thousand, nine hundred ninety-six".