19642016 has 12 divisors (see below), whose sum is σ = 38670282. Its totient is φ = 9820992.

The previous prime is 19642001. The next prime is 19642027. The reversal of 19642016 is 61024691.

It can be written as a sum of positive squares in only one way, i.e., 16032016 + 3610000 = 4004^2 + 1900^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19642016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306875 + ... + 306938.

Almost surely, 2^19642016 is an apocalyptic number.

19642016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19642016 is a deficient number, since it is larger than the sum of its proper divisors (19028266).

19642016 is an equidigital number, since it uses as much as digits as its factorization.

19642016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613823 (or 613815 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 19642016 is about 4431.9314074114. The cubic root of 19642016 is about 269.8124715198.

The spelling of 19642016 in words is "nineteen million, six hundred forty-two thousand, sixteen".