19394105234 has 12 divisors (see below), whose sum is σ = 33840734814. Its totient is φ = 8311759344.

The previous prime is 19394105209. The next prime is 19394105251. The reversal of 19394105234 is 43250149391.

It can be written as a sum of positive squares in only one way, i.e., 16616499025 + 2777606209 = 128905^2 + 52703^2 .

It is a super-2 number, since 2×19394105234² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19394105191 and 19394105200.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 98949419 + ... + 98949614.

Almost surely, 2^19394105234 is an apocalyptic number.

19394105234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19394105234 is a deficient number, since it is larger than the sum of its proper divisors (14446629580).

19394105234 is a wasteful number, since it uses less digits than its factorization.

19394105234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197899049 (or 197899042 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 19394105234 in words is "nineteen billion, three hundred ninety-four million, one hundred five thousand, two hundred thirty-four".