20472373 has 4 divisors (see below), whose sum is σ = 20495340. Its totient is φ = 20449408.

The previous prime is 20472349. The next prime is 20472377. The reversal of 20472373 is 37327402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1129969 + 19342404 = 1063^2 + 4398^2 .

It is a cyclic number.

It is not a de Polignac number, because 20472373 - 2⁵ = 20472341 is a prime.

It is a super-2 number, since 2×20472373² = 838236112502258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472377) 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, 10090 + ... + 11947.

It is an arithmetic number, because the mean of its divisors is an integer number (5123835).

Almost surely, 2^20472373 is an apocalyptic number.

It is an amenable number.

20472373 is a deficient number, since it is larger than the sum of its proper divisors (22967).

20472373 is an equidigital number, since it uses as much as digits as its factorization.

20472373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22966.

The product of its (nonzero) digits is 7056, while the sum is 28.

The square root of 20472373 is about 4524.6406487145. The cubic root of 20472373 is about 273.5621837446.

Adding to 20472373 its reverse (37327402), we get a palindrome (57799775).

The spelling of 20472373 in words is "twenty million, four hundred seventy-two thousand, three hundred seventy-three".