19802063807 has 4 divisors (see below), whose sum is σ = 19810503336. Its totient is φ = 19793624280.

The previous prime is 19802063803. The next prime is 19802063833. The reversal of 19802063807 is 70836020891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19802063807 - 2² = 19802063803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19802063803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4216244 + ... + 4220937.

It is an arithmetic number, because the mean of its divisors is an integer number (4952625834).

Almost surely, 2^19802063807 is an apocalyptic number.

19802063807 is a deficient number, since it is larger than the sum of its proper divisors (8439529).

19802063807 is an equidigital number, since it uses as much as digits as its factorization.

19802063807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8439528.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 19802063807 in words is "nineteen billion, eight hundred two million, sixty-three thousand, eight hundred seven".