19651008080212 has 6 divisors (see below), whose sum is σ = 34389264140378. Its totient is φ = 9825504040104.

The previous prime is 19651008080183. The next prime is 19651008080213. The reversal of 19651008080212 is 21208080015691.

It can be written as a sum of positive squares in only one way, i.e., 10143677187396 + 9507330892816 = 3184914^2 + 3083396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19651008080213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2456376010023 + ... + 2456376010030.

Almost surely, 2^{19651008080212} is an apocalyptic number.

It is an amenable number.

19651008080212 is a deficient number, since it is larger than the sum of its proper divisors (14738256060166).

19651008080212 is a wasteful number, since it uses less digits than its factorization.

19651008080212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4912752020057 (or 4912752020055 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 43.

The spelling of 19651008080212 in words is "nineteen trillion, six hundred fifty-one billion, eight million, eighty thousand, two hundred twelve".