193394706690 has 64 divisors (see below), whose sum is σ = 473052182400. Its totient is φ = 50583097344.

The previous prime is 193394706683. The next prime is 193394706691. The reversal of 193394706690 is 96607493391.

It is a super-2 number, since 2×193394706690² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 193394706690.

It is not an unprimeable number, because it can be changed into a prime (193394706691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5609826 + ... + 5644194.

It is an arithmetic number, because the mean of its divisors is an integer number (7391440350).

Almost surely, 2^193394706690 is an apocalyptic number.

193394706690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 193394706690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236526091200).

193394706690 is an abundant number, since it is smaller than the sum of its proper divisors (279657475710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

193394706690 is a wasteful number, since it uses less digits than its factorization.

193394706690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37971.

The product of its (nonzero) digits is 6613488, while the sum is 57.

The spelling of 193394706690 in words is "one hundred ninety-three billion, three hundred ninety-four million, seven hundred six thousand, six hundred ninety".