19630816 has 12 divisors (see below), whose sum is σ = 38648232. Its totient is φ = 9815392.

The previous prime is 19630811. The next prime is 19630823. The reversal of 19630816 is 61803691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19630811) 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, 306700 + ... + 306763.

It is an arithmetic number, because the mean of its divisors is an integer number (3220686).

Almost surely, 2^19630816 is an apocalyptic number.

19630816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19630816 is a deficient number, since it is larger than the sum of its proper divisors (19017416).

19630816 is an equidigital number, since it uses as much as digits as its factorization.

19630816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613473 (or 613465 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 19630816 is about 4430.6676697762. The cubic root of 19630816 is about 269.7611788515.

The spelling of 19630816 in words is "nineteen million, six hundred thirty thousand, eight hundred sixteen".