19681796 has 12 divisors (see below), whose sum is σ = 36256080. Its totient is φ = 9322920.

The previous prime is 19681789. The next prime is 19681841. The reversal of 19681796 is 69718691.

It is a super-3 number, since 3×19681796³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19681796.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129410 + ... + 129561.

It is an arithmetic number, because the mean of its divisors is an integer number (3021340).

Almost surely, 2^19681796 is an apocalyptic number.

It is an amenable number.

19681796 is a deficient number, since it is larger than the sum of its proper divisors (16574284).

19681796 is a wasteful number, since it uses less digits than its factorization.

19681796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258994 (or 258992 counting only the distinct ones).

The product of its digits is 163296, while the sum is 47.

The square root of 19681796 is about 4436.4170227786. The cubic root of 19681796 is about 269.9944946294.

It can be divided in two parts, 196 and 81796, that multiplied together give a square (16032016 = 4004²).

The spelling of 19681796 in words is "nineteen million, six hundred eighty-one thousand, seven hundred ninety-six".