20472303 has 4 divisors (see below), whose sum is σ = 27296408. Its totient is φ = 13648200.

The previous prime is 20472299. The next prime is 20472341. The reversal of 20472303 is 30327402.

It is a happy number.

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

It is not a de Polignac number, because 20472303 - 2² = 20472299 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 20472303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3412048 + ... + 3412053.

It is an arithmetic number, because the mean of its divisors is an integer number (6824102).

Almost surely, 2^20472303 is an apocalyptic number.

20472303 is a deficient number, since it is larger than the sum of its proper divisors (6824105).

20472303 is an equidigital number, since it uses as much as digits as its factorization.

20472303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6824104.

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 20472303 is about 4524.6329132870. The cubic root of 20472303 is about 273.5618719525.

Adding to 20472303 its reverse (30327402), we get a palindrome (50799705).

The spelling of 20472303 in words is "twenty million, four hundred seventy-two thousand, three hundred three".