20445552 has 60 divisors (see below), whose sum is σ = 58631664. Its totient is φ = 6647040.

The previous prime is 20445541. The next prime is 20445583. The reversal of 20445552 is 25554402.

20445552 is a `hidden beast` number, since 204 + 455 + 5 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4173 + ... + 7635.

Almost surely, 2^20445552 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 20445552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29315832).

20445552 is an abundant number, since it is smaller than the sum of its proper divisors (38186112).

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

20445552 is a wasteful number, since it uses less digits than its factorization.

20445552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518 (or 3509 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 20445552 is about 4521.6757955431. The cubic root of 20445552 is about 273.4426662882.

Adding to 20445552 its reverse (25554402), we get a palindrome (45999954).

The spelling of 20445552 in words is "twenty million, four hundred forty-five thousand, five hundred fifty-two".