20452480 has 32 divisors (see below), whose sum is σ = 48895740. Its totient is φ = 8180736.

The previous prime is 20452469. The next prime is 20452499. The reversal of 20452480 is 8425402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20286016 + 166464 = 4504^2 + 408^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15339 + ... + 16618.

Almost surely, 2^20452480 is an apocalyptic number.

20452480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20452480 is an abundant number, since it is smaller than the sum of its proper divisors (28443260).

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

20452480 is an equidigital number, since it uses as much as digits as its factorization.

20452480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31976 (or 31964 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 20452480 is about 4522.4418183101. The cubic root of 20452480 is about 273.4735482597.

Adding to 20452480 its reverse (8425402), we get a palindrome (28877882).

The spelling of 20452480 in words is "twenty million, four hundred fifty-two thousand, four hundred eighty".