194520208340 has 24 divisors (see below), whose sum is σ = 408661547112. Its totient is φ = 77775872000.

The previous prime is 194520208313. The next prime is 194520208369. The reversal of 194520208340 is 43802025491.

It can be written as a sum of positive squares in 4 ways, for example, as 64940367556 + 129579840784 = 254834^2 + 359972^2 .

It is a super-2 number, since 2×194520208340² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 194520208294 and 194520208303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1963661 + ... + 2060340.

It is an arithmetic number, because the mean of its divisors is an integer number (17027564463).

Almost surely, 2^194520208340 is an apocalyptic number.

194520208340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194520208340 is an abundant number, since it is smaller than the sum of its proper divisors (214141338772).

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

194520208340 is a wasteful number, since it uses less digits than its factorization.

194520208340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4026427 (or 4026425 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 194520208340 in words is "one hundred ninety-four billion, five hundred twenty million, two hundred eight thousand, three hundred forty".