19327703805 has 48 divisors (see below), whose sum is σ = 34718814000. Its totient is φ = 9934783488.

The previous prime is 19327703789. The next prime is 19327703807. The reversal of 19327703805 is 50830772391.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5009666841 + 14318036964 = 70779^2 + 119658^2 .

It is not a de Polignac number, because 19327703805 - 2⁴ = 19327703789 is a prime.

It is a super-2 number, since 2×19327703805² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19327703807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 729531 + ... + 755559.

It is an arithmetic number, because the mean of its divisors is an integer number (723308625).

Almost surely, 2^19327703805 is an apocalyptic number.

19327703805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19327703805 is a deficient number, since it is larger than the sum of its proper divisors (15391110195).

19327703805 is a wasteful number, since it uses less digits than its factorization.

19327703805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26638 (or 26635 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 19327703805 in words is "nineteen billion, three hundred twenty-seven million, seven hundred three thousand, eight hundred five".