19961086 has 16 divisors (see below), whose sum is σ = 31102848. Its totient is φ = 9597600.

The previous prime is 19961069. The next prime is 19961099. The reversal of 19961086 is 68016991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9796 + ... + 11656.

It is an arithmetic number, because the mean of its divisors is an integer number (1943928).

Almost surely, 2^19961086 is an apocalyptic number.

19961086 is a deficient number, since it is larger than the sum of its proper divisors (11141762).

19961086 is a wasteful number, since it uses less digits than its factorization.

19961086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2067.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 19961086 is about 4467.7831191767. The cubic root of 19961086 is about 271.2655992784.

The spelling of 19961086 in words is "nineteen million, nine hundred sixty-one thousand, eighty-six".