19962923845 has 4 divisors (see below), whose sum is σ = 23955508620. Its totient is φ = 15970339072.

The previous prime is 19962923843. The next prime is 19962923891. The reversal of 19962923845 is 54832926991.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12684615876 + 7278307969 = 112626^2 + 85313^2 .

It is a cyclic number.

It is not a de Polignac number, because 19962923845 - 2¹ = 19962923843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19962923845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19962923843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1996292380 + ... + 1996292389.

It is an arithmetic number, because the mean of its divisors is an integer number (5988877155).

Almost surely, 2^19962923845 is an apocalyptic number.

It is an amenable number.

19962923845 is a deficient number, since it is larger than the sum of its proper divisors (3992584775).

19962923845 is an equidigital number, since it uses as much as digits as its factorization.

19962923845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992584774.

The product of its digits is 8398080, while the sum is 58.

The spelling of 19962923845 in words is "nineteen billion, nine hundred sixty-two million, nine hundred twenty-three thousand, eight hundred forty-five".