19912093601908 has 12 divisors (see below), whose sum is σ = 35154536935140. Its totient is φ = 9867940191872.

The previous prime is 19912093601879. The next prime is 19912093601921. The reversal of 19912093601908 is 80910639021991.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2257121626384 + 17654971975524 = 1502372^2 + 4201782^2 .

It is a super-2 number, since 2×19912093601908² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22026651763 + ... + 22026652666.

It is an arithmetic number, because the mean of its divisors is an integer number (2929544744595).

Almost surely, 2^{19912093601908} is an apocalyptic number.

It is an amenable number.

19912093601908 is a deficient number, since it is larger than the sum of its proper divisors (15242443333232).

19912093601908 is a wasteful number, since it uses less digits than its factorization.

19912093601908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44053304546 (or 44053304544 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 58.

The spelling of 19912093601908 in words is "nineteen trillion, nine hundred twelve billion, ninety-three million, six hundred one thousand, nine hundred eight".