20103709 has 8 divisors (see below), whose sum is σ = 20588960. Its totient is φ = 19623600.

The previous prime is 20103701. The next prime is 20103737. The reversal of 20103709 is 90730102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20103709 - 2³ = 20103701 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 20103709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20103701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7294 + ... + 9664.

It is an arithmetic number, because the mean of its divisors is an integer number (2573620).

Almost surely, 2^20103709 is an apocalyptic number.

It is an amenable number.

20103709 is a deficient number, since it is larger than the sum of its proper divisors (485251).

20103709 is a wasteful number, since it uses less digits than its factorization.

20103709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 20103709 is about 4483.7159811924. The cubic root of 20103709 is about 271.9101355745.

The spelling of 20103709 in words is "twenty million, one hundred three thousand, seven hundred nine".