19871093 has 16 divisors (see below), whose sum is σ = 23562240. Its totient is φ = 16556400.

The previous prime is 19871081. The next prime is 19871099. The reversal of 19871093 is 39017891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19871093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19871099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4946 + ... + 8012.

It is an arithmetic number, because the mean of its divisors is an integer number (1472640).

Almost surely, 2^19871093 is an apocalyptic number.

It is an amenable number.

19871093 is a deficient number, since it is larger than the sum of its proper divisors (3691147).

19871093 is a wasteful number, since it uses less digits than its factorization.

19871093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 19871093 is about 4457.7004161339. The cubic root of 19871093 is about 270.8573251698.

The spelling of 19871093 in words is "nineteen million, eight hundred seventy-one thousand, ninety-three".