20003495 has 8 divisors (see below), whose sum is σ = 24653184. Its totient is φ = 15570144.

The previous prime is 20003461. The next prime is 20003497. The reversal of 20003495 is 59430002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20003495 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 20003495.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003497) 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, 53879 + ... + 54248.

It is an arithmetic number, because the mean of its divisors is an integer number (3081648).

Almost surely, 2^20003495 is an apocalyptic number.

20003495 is a deficient number, since it is larger than the sum of its proper divisors (4649689).

20003495 is a wasteful number, since it uses less digits than its factorization.

20003495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108169.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20003495 is about 4472.5266908091. The cubic root of 20003495 is about 271.4575722212.

Adding to 20003495 its reverse (59430002), we get a palindrome (79433497).

The spelling of 20003495 in words is "twenty million, three thousand, four hundred ninety-five".