19605942353543 has 64 divisors (see below), whose sum is σ = 26665513943040. Its totient is φ = 13962593728512.

The previous prime is 19605942353537. The next prime is 19605942353573. The reversal of 19605942353543 is 34535324950691.

It is not a de Polignac number, because 19605942353543 - 2⁸ = 19605942353287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19605942353573) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 208777946 + ... + 208871832.

It is an arithmetic number, because the mean of its divisors is an integer number (416648655360).

Almost surely, 2^{19605942353543} is an apocalyptic number.

19605942353543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

19605942353543 is a deficient number, since it is larger than the sum of its proper divisors (7059571589497).

19605942353543 is a wasteful number, since it uses less digits than its factorization.

19605942353543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99816.

The product of its (nonzero) digits is 52488000, while the sum is 59.

The spelling of 19605942353543 in words is "nineteen trillion, six hundred five billion, nine hundred forty-two million, three hundred fifty-three thousand, five hundred forty-three".