19143706986 has 12 divisors (see below), whose sum is σ = 41478031842. Its totient is φ = 6381235656.

The previous prime is 19143706973. The next prime is 19143706991. The reversal of 19143706986 is 68960734191.

19143706986 is a `hidden beast` number, since 191 + 4 + 370 + 6 + 9 + 86 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15088437225 + 4055269761 = 122835^2 + 63681^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 531769621 + ... + 531769656.

Almost surely, 2^19143706986 is an apocalyptic number.

19143706986 is an abundant number, since it is smaller than the sum of its proper divisors (22334324856).

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

19143706986 is a wasteful number, since it uses less digits than its factorization.

19143706986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063539285 (or 1063539282 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 19143706986 in words is "nineteen billion, one hundred forty-three million, seven hundred six thousand, nine hundred eighty-six".