19927895361881 has 8 divisors (see below), whose sum is σ = 21460899620160. Its totient is φ = 18394903850832.

The previous prime is 19927895361851. The next prime is 19927895361947. The reversal of 19927895361881 is 18816359872991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19927895361881 is a prime.

It is a super-2 number, since 2×19927895361881² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19927895361811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192830 + ... + 6316088.

It is an arithmetic number, because the mean of its divisors is an integer number (2682612452520).

Almost surely, 2^{19927895361881} is an apocalyptic number.

It is an amenable number.

19927895361881 is a deficient number, since it is larger than the sum of its proper divisors (1533004258279).

19927895361881 is a wasteful number, since it uses less digits than its factorization.

19927895361881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6373615.

The product of its digits is 470292480, while the sum is 77.

The spelling of 19927895361881 in words is "nineteen trillion, nine hundred twenty-seven billion, eight hundred ninety-five million, three hundred sixty-one thousand, eight hundred eighty-one".