19967863196541 has 128 divisors (see below), whose sum is σ = 31635735183360. Its totient is φ = 11084695776000.

The previous prime is 19967863196539. The next prime is 19967863196549. The reversal of 19967863196541 is 14569136876991.

It is not a de Polignac number, because 19967863196541 - 2¹ = 19967863196539 is a prime.

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 polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5185109266 + ... + 5185113116.

It is an arithmetic number, because the mean of its divisors is an integer number (247154181120).

Almost surely, 2^{19967863196541} is an apocalyptic number.

It is an amenable number.

19967863196541 is a deficient number, since it is larger than the sum of its proper divisors (11667871986819).

19967863196541 is a wasteful number, since it uses less digits than its factorization.

19967863196541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5207.

The product of its digits is 529079040, while the sum is 75.

The spelling of 19967863196541 in words is "nineteen trillion, nine hundred sixty-seven billion, eight hundred sixty-three million, one hundred ninety-six thousand, five hundred forty-one".