193856421370 has 32 divisors (see below), whose sum is σ = 357129347328. Its totient is φ = 75730129728.

The previous prime is 193856421289. The next prime is 193856421371. The reversal of 193856421370 is 73124658391.

It is not an unprimeable number, because it can be changed into a prime (193856421371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222117 + ... + 661096.

It is an arithmetic number, because the mean of its divisors is an integer number (11160292104).

It is a 1-persistent number, because it is pandigital, but 2⋅193856421370 = 387712842740 is not.

Almost surely, 2^193856421370 is an apocalyptic number.

193856421370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

193856421370 is a deficient number, since it is larger than the sum of its proper divisors (163272925958).

193856421370 is a wasteful number, since it uses less digits than its factorization.

193856421370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883734.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 193856421370 in words is "one hundred ninety-three billion, eight hundred fifty-six million, four hundred twenty-one thousand, three hundred seventy".