20472343 has 4 divisors (see below), whose sum is σ = 20948488. Its totient is φ = 19996200.

The previous prime is 20472341. The next prime is 20472349. The reversal of 20472343 is 34327402.

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

It is a cyclic number.

It is not a de Polignac number, because 20472343 - 2¹ = 20472341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472341) 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 3 ways as a sum of consecutive naturals, for example, 238008 + ... + 238093.

It is an arithmetic number, because the mean of its divisors is an integer number (5237122).

Almost surely, 2^20472343 is an apocalyptic number.

20472343 is a deficient number, since it is larger than the sum of its proper divisors (476145).

20472343 is an equidigital number, since it uses as much as digits as its factorization.

20472343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476144.

The product of its (nonzero) digits is 4032, while the sum is 25.

The square root of 20472343 is about 4524.6373335329. The cubic root of 20472343 is about 273.5620501195.

Adding to 20472343 its reverse (34327402), we get a palindrome (54799745).

It can be divided in two parts, 204723 and 43, that multiplied together give a square (8803089 = 2967²).

The spelling of 20472343 in words is "twenty million, four hundred seventy-two thousand, three hundred forty-three".