20201472 has 90 divisors (see below), whose sum is σ = 58783998. Its totient is φ = 6684672.

The previous prime is 20201449. The next prime is 20201477. The reversal of 20201472 is 27410202.

It can be written as a sum of positive squares in only one way, i.e., 17842176 + 2359296 = 4224^2 + 1536^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 147388 + ... + 147524.

Almost surely, 2^20201472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20201472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29391999).

20201472 is an abundant number, since it is smaller than the sum of its proper divisors (38582526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20201472 is an equidigital number, since it uses as much as digits as its factorization.

20201472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20201472 is about 4494.6047657163. The cubic root of 20201472 is about 272.3501833383.

Adding to 20201472 its reverse (27410202), we get a palindrome (47611674).

The spelling of 20201472 in words is "twenty million, two hundred one thousand, four hundred seventy-two".