20524480 has 56 divisors (see below), whose sum is σ = 50474880. Its totient is φ = 7941120.

The previous prime is 20524451. The next prime is 20524499. The reversal of 20524480 is 8442502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8886 + ... + 10954.

Almost surely, 2^20524480 is an apocalyptic number.

20524480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20524480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25237440).

20524480 is an abundant number, since it is smaller than the sum of its proper divisors (29950400).

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

20524480 is a wasteful number, since it uses less digits than its factorization.

20524480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117 (or 2107 counting only the distinct ones).

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

The square root of 20524480 is about 4530.3951262555. The cubic root of 20524480 is about 273.7940804588.

Adding to 20524480 its reverse (8442502), we get a palindrome (28966982).

The spelling of 20524480 in words is "twenty million, five hundred twenty-four thousand, four hundred eighty".