19740043895 has 32 divisors (see below), whose sum is σ = 27849939264. Its totient is φ = 13242240000.

The previous prime is 19740043889. The next prime is 19740043909. The reversal of 19740043895 is 59834004791.

It is not a de Polignac number, because 19740043895 - 2⁶ = 19740043831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1029395 + ... + 1048395.

It is an arithmetic number, because the mean of its divisors is an integer number (870310602).

Almost surely, 2^19740043895 is an apocalyptic number.

19740043895 is a deficient number, since it is larger than the sum of its proper divisors (8109895369).

19740043895 is a wasteful number, since it uses less digits than its factorization.

19740043895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20483.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 19740043895 in words is "nineteen billion, seven hundred forty million, forty-three thousand, eight hundred ninety-five".