20481552 has 160 divisors (see below), whose sum is σ = 72495360. Its totient is φ = 5391360.

The previous prime is 20481541. The next prime is 20481553. The reversal of 20481552 is 25518402.

It is a happy number.

20481552 is nontrivially palindromic in base 5.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20481553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39052 + ... + 39572.

It is an arithmetic number, because the mean of its divisors is an integer number (453096).

Almost surely, 2^20481552 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 20481552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36247680).

20481552 is an abundant number, since it is smaller than the sum of its proper divisors (52013808).

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

20481552 is a wasteful number, since it uses less digits than its factorization.

20481552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 20481552 is about 4525.6548697398. The cubic root of 20481552 is about 273.6030624465.

Adding to 20481552 its reverse (25518402), we get a palindrome (45999954).

It can be divided in two parts, 2048 and 1552, that added together give a square (3600 = 60²).

The spelling of 20481552 in words is "twenty million, four hundred eighty-one thousand, five hundred fifty-two".