19486654866 has 240 divisors, whose sum is σ = 54624240000. Its totient is φ = 5160480192.

The previous prime is 19486654841. The next prime is 19486654879. The reversal of 19486654866 is 66845668491.

19486654866 is a `hidden beast` number, since 1 + 9 + 4 + 86 + 6 + 548 + 6 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 7087260 + ... + 7090008.

It is an arithmetic number, because the mean of its divisors is an integer number (227601000).

Almost surely, 2^19486654866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19486654866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27312120000).

19486654866 is an abundant number, since it is smaller than the sum of its proper divisors (35137585134).

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

19486654866 is a wasteful number, since it uses less digits than its factorization.

19486654866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843 (or 2827 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 63.

The spelling of 19486654866 in words is "nineteen billion, four hundred eighty-six million, six hundred fifty-four thousand, eight hundred sixty-six".