19854113 has 4 divisors (see below), whose sum is σ = 21022020. Its totient is φ = 18686208.

The previous prime is 19854061. The next prime is 19854137. The reversal of 19854113 is 31145891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31145891 = 7 ⋅4449413.

It can be written as a sum of positive squares in 2 ways, for example, as 9690769 + 10163344 = 3113^2 + 3188^2 .

It is a cyclic number.

It is not a de Polignac number, because 19854113 - 2⁶ = 19854049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19854113.

It is not an unprimeable number, because it can be changed into a prime (19854193) 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 3 ways as a sum of consecutive naturals, for example, 583928 + ... + 583961.

It is an arithmetic number, because the mean of its divisors is an integer number (5255505).

Almost surely, 2^19854113 is an apocalyptic number.

It is an amenable number.

19854113 is a deficient number, since it is larger than the sum of its proper divisors (1167907).

19854113 is a wasteful number, since it uses less digits than its factorization.

19854113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167906.

The product of its digits is 4320, while the sum is 32.

The square root of 19854113 is about 4455.7954396494. The cubic root of 19854113 is about 270.7801533033.

The spelling of 19854113 in words is "nineteen million, eight hundred fifty-four thousand, one hundred thirteen".