19707812 has 6 divisors (see below), whose sum is σ = 34488678. Its totient is φ = 9853904.

The previous prime is 19707799. The next prime is 19707833. The reversal of 19707812 is 21870791.

It can be written as a sum of positive squares in only one way, i.e., 19589476 + 118336 = 4426^2 + 344^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2463473 + ... + 2463480.

It is an arithmetic number, because the mean of its divisors is an integer number (5748113).

Almost surely, 2^19707812 is an apocalyptic number.

It is an amenable number.

19707812 is a deficient number, since it is larger than the sum of its proper divisors (14780866).

19707812 is a wasteful number, since it uses less digits than its factorization.

19707812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4926957 (or 4926955 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 19707812 is about 4439.3481503482. The cubic root of 19707812 is about 270.1134045791.

The spelling of 19707812 in words is "nineteen million, seven hundred seven thousand, eight hundred twelve".