19823866159408 has 10 divisors (see below), whose sum is σ = 38408740683884. Its totient is φ = 9911933079696.

The previous prime is 19823866159393. The next prime is 19823866159441. The reversal of 19823866159408 is 80495166832891.

It is a super-2 number, since 2×19823866159408² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619495817466 + ... + 619495817497.

Almost surely, 2^{19823866159408} is an apocalyptic number.

It is an amenable number.

19823866159408 is a deficient number, since it is larger than the sum of its proper divisors (18584874524476).

19823866159408 is a wasteful number, since it uses less digits than its factorization.

19823866159408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238991634971 (or 1238991634965 counting only the distinct ones).

The product of its (nonzero) digits is 179159040, while the sum is 70.

The spelling of 19823866159408 in words is "nineteen trillion, eight hundred twenty-three billion, eight hundred sixty-six million, one hundred fifty-nine thousand, four hundred eight".