20115472 has 40 divisors (see below), whose sum is σ = 42446936. Its totient is φ = 9179136.

The previous prime is 20115467. The next prime is 20115481. The reversal of 20115472 is 27451102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2676496 + 17438976 = 1636^2 + 4176^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19678 + ... + 20674.

Almost surely, 2^20115472 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 20115472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21223468).

20115472 is an abundant number, since it is smaller than the sum of its proper divisors (22331464).

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

20115472 is a wasteful number, since it uses less digits than its factorization.

20115472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115 (or 1109 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 20115472 is about 4485.0275361474. The cubic root of 20115472 is about 271.9631582165.

Adding to 20115472 its reverse (27451102), we get a palindrome (47566574).

The spelling of 20115472 in words is "twenty million, one hundred fifteen thousand, four hundred seventy-two".