19891094 has 16 divisors (see below), whose sum is σ = 30681600. Its totient is φ = 9667944.

The previous prime is 19891073. The next prime is 19891099. The reversal of 19891094 is 49019891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19891099) by changing a digit.

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, 9647 + ... + 11525.

It is an arithmetic number, because the mean of its divisors is an integer number (1917600).

Almost surely, 2^19891094 is an apocalyptic number.

19891094 is a deficient number, since it is larger than the sum of its proper divisors (10790506).

19891094 is a wasteful number, since it uses less digits than its factorization.

19891094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 19891094 is about 4459.9432731818. The cubic root of 19891094 is about 270.9481707139.

The spelling of 19891094 in words is "nineteen million, eight hundred ninety-one thousand, ninety-four".