193939452008 has 8 divisors (see below), whose sum is σ = 363636472530. Its totient is φ = 96969726000.

The previous prime is 193939451977. The next prime is 193939452023. The reversal of 193939452008 is 800254939391.

It can be written as a sum of positive squares in only one way, i.e., 100500412324 + 93439039684 = 317018^2 + 305678^2 .

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

It is a super-2 number, since 2×193939452008² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12121215743 + ... + 12121215758.

Almost surely, 2^193939452008 is an apocalyptic number.

It is an amenable number.

193939452008 is a deficient number, since it is larger than the sum of its proper divisors (169697020522).

193939452008 is a wasteful number, since it uses less digits than its factorization.

193939452008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24242431507 (or 24242431503 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 193939452008 in words is "one hundred ninety-three billion, nine hundred thirty-nine million, four hundred fifty-two thousand, eight".