19811073339128 has 32 divisors (see below), whose sum is σ = 37383019923360. Its totient is φ = 9842270256000.

The previous prime is 19811073339119. The next prime is 19811073339137. The reversal of 19811073339128 is 82193337011891.

It is an interprime number because it is at equal distance from previous prime (19811073339119) and next prime (19811073339137).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99203378 + ... + 99402878.

It is an arithmetic number, because the mean of its divisors is an integer number (1168219372605).

Almost surely, 2^{19811073339128} is an apocalyptic number.

It is an amenable number.

19811073339128 is a deficient number, since it is larger than the sum of its proper divisors (17571946584232).

19811073339128 is a wasteful number, since it uses less digits than its factorization.

19811073339128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278727 (or 278723 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 56.

It can be divided in two parts, 1981107 and 3339128, that added together give a palindrome (5320235).

The spelling of 19811073339128 in words is "nineteen trillion, eight hundred eleven billion, seventy-three million, three hundred thirty-nine thousand, one hundred twenty-eight".