19704957943 has 16 divisors (see below), whose sum is σ = 21642671232. Its totient is φ = 17791852000.

The previous prime is 19704957901. The next prime is 19704957953. The reversal of 19704957943 is 34975940791.

It is a cyclic number.

It is not a de Polignac number, because 19704957943 - 2¹³ = 19704949751 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 (19704957953) 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 15 ways as a sum of consecutive naturals, for example, 2071428 + ... + 2080918.

It is an arithmetic number, because the mean of its divisors is an integer number (1352666952).

Almost surely, 2^19704957943 is an apocalyptic number.

19704957943 is a deficient number, since it is larger than the sum of its proper divisors (1937713289).

19704957943 is a wasteful number, since it uses less digits than its factorization.

19704957943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10766.

The product of its (nonzero) digits is 8573040, while the sum is 58.

The spelling of 19704957943 in words is "nineteen billion, seven hundred four million, nine hundred fifty-seven thousand, nine hundred forty-three".