20280552 has 32 divisors (see below), whose sum is σ = 51317280. Its totient is φ = 6678080.

The previous prime is 20280529. The next prime is 20280569. The reversal of 20280552 is 25508202.

It is a super-2 number, since 2×20280552² = 822601578849408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3099 + ... + 7082.

It is an arithmetic number, because the mean of its divisors is an integer number (1603665).

Almost surely, 2^20280552 is an apocalyptic number.

It is an amenable number.

20280552 is an abundant number, since it is smaller than the sum of its proper divisors (31036728).

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

20280552 is a wasteful number, since it uses less digits than its factorization.

20280552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10273 (or 10269 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 20280552 is about 4503.3933872137. The cubic root of 20280552 is about 272.7050982375.

Adding to 20280552 its reverse (25508202), we get a palindrome (45788754).

The spelling of 20280552 in words is "twenty million, two hundred eighty thousand, five hundred fifty-two".