20071803 has 4 divisors (see below), whose sum is σ = 26762408. Its totient is φ = 13381200.

The previous prime is 20071783. The next prime is 20071811. The reversal of 20071803 is 30817002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20071803 - 2¹⁰ = 20070779 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 20071803.

It is not an unprimeable number, because it can be changed into a prime (20071813) 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, 3345298 + ... + 3345303.

It is an arithmetic number, because the mean of its divisors is an integer number (6690602).

Almost surely, 2^20071803 is an apocalyptic number.

20071803 is a deficient number, since it is larger than the sum of its proper divisors (6690605).

20071803 is an equidigital number, since it uses as much as digits as its factorization.

20071803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6690604.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 20071803 is about 4480.1565820851. The cubic root of 20071803 is about 271.7662125731.

Adding to 20071803 its reverse (30817002), we get a palindrome (50888805).

The spelling of 20071803 in words is "twenty million, seventy-one thousand, eight hundred three".