19806740941 has 8 divisors (see below), whose sum is σ = 21350304920. Its totient is φ = 18266029632.

The previous prime is 19806740917. The next prime is 19806740977. The reversal of 19806740941 is 14904760891.

It can be written as a sum of positive squares in 4 ways, for example, as 331422025 + 19475318916 = 18205^2 + 139554^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19806740941 - 2²⁵ = 19773186509 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 (19806740911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698730 + ... + 726523.

It is an arithmetic number, because the mean of its divisors is an integer number (2668788115).

Almost surely, 2^19806740941 is an apocalyptic number.

It is an amenable number.

19806740941 is a deficient number, since it is larger than the sum of its proper divisors (1543563979).

19806740941 is a wasteful number, since it uses less digits than its factorization.

19806740941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426335.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 19806740941 in words is "nineteen billion, eight hundred six million, seven hundred forty thousand, nine hundred forty-one".