19967863196540 has 24 divisors (see below), whose sum is σ = 47922871672032. Its totient is φ = 6846124524480.

The previous prime is 19967863196539. The next prime is 19967863196549. The reversal of 19967863196540 is 4569136876991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19967863196549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71313796991 + ... + 71313797270.

It is an arithmetic number, because the mean of its divisors is an integer number (1996786319668).

Almost surely, 2^{19967863196540} is an apocalyptic number.

19967863196540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19967863196540 is an abundant number, since it is smaller than the sum of its proper divisors (27955008475492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19967863196540 is a wasteful number, since it uses less digits than its factorization.

19967863196540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142627594277 (or 142627594275 counting only the distinct ones).

The product of its (nonzero) digits is 529079040, while the sum is 74.

The spelling of 19967863196540 in words is "nineteen trillion, nine hundred sixty-seven billion, eight hundred sixty-three million, one hundred ninety-six thousand, five hundred forty".