19925554399144 has 16 divisors (see below), whose sum is σ = 37360659126420. Its totient is φ = 9962711965440.

The previous prime is 19925554399117. The next prime is 19925554399181. The reversal of 19925554399144 is 44199345552991.

It can be written as a sum of positive squares in 2 ways, for example, as 18257349671044 + 1668204728100 = 4272862^2 + 1291590^2 .

It is a super-2 number, since 2×19925554399144² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6843729 + ... + 9310624.

Almost surely, 2^{19925554399144} is an apocalyptic number.

It is an amenable number.

19925554399144 is a deficient number, since it is larger than the sum of its proper divisors (17435104727276).

19925554399144 is a wasteful number, since it uses less digits than its factorization.

19925554399144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16308540 (or 16308536 counting only the distinct ones).

The product of its digits is 314928000, while the sum is 70.

The spelling of 19925554399144 in words is "nineteen trillion, nine hundred twenty-five billion, five hundred fifty-four million, three hundred ninety-nine thousand, one hundred forty-four".