193440421784 has 8 divisors (see below), whose sum is σ = 362700790860. Its totient is φ = 96720210888.

The previous prime is 193440421777. The next prime is 193440421799. The reversal of 193440421784 is 487124044391.

193440421784 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12090026354 + ... + 12090026369.

Almost surely, 2^193440421784 is an apocalyptic number.

It is an amenable number.

193440421784 is a deficient number, since it is larger than the sum of its proper divisors (169260369076).

193440421784 is a wasteful number, since it uses less digits than its factorization.

193440421784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24180052729 (or 24180052725 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 193440421784 in words is "one hundred ninety-three billion, four hundred forty million, four hundred twenty-one thousand, seven hundred eighty-four".