19518966027 has 24 divisors (see below), whose sum is σ = 30916552368. Its totient is φ = 11768371200.

The previous prime is 19518966023. The next prime is 19518966043. The reversal of 19518966027 is 72066981591.

19518966027 is a `hidden beast` number, since 19 + 5 + 18 + 9 + 6 + 602 + 7 = 666.

It is not a de Polignac number, because 19518966027 - 2² = 19518966023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19518966023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 491674 + ... + 529887.

It is an arithmetic number, because the mean of its divisors is an integer number (1288189682).

Almost surely, 2^19518966027 is an apocalyptic number.

19518966027 is a deficient number, since it is larger than the sum of its proper divisors (11397586341).

19518966027 is a wasteful number, since it uses less digits than its factorization.

19518966027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021771 (or 1021768 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 19518966027 in words is "nineteen billion, five hundred eighteen million, nine hundred sixty-six thousand, twenty-seven".